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1. I ________ football in the playground at 5 o’clock every day. He _____ football.
But yesterday we _____at four o’clock. (plays, played, play)
2. Who ______this picture? Daming did. (take, took)
3. Did you _______ the schoolbag? Yes, I did. I _____it on the floor. (drop, dropped,droped)
4._______ water did you buy? Two bottles. (how many ,how much)
5.There _______lots of apples in the bag. (be, am,is, are, was, were)
6.There _______lots of meat on the table. (be, am,is ,are, was, were)
7.What did you ______? We ______some ice creams. ( buy, bought)
8.Is this _____(your, you) T-shirt? Yes, it’s _______(I ,me ,my) T-shirt.
9._______did you go there? By car. ( How, Why , When ,Where, What, Who)
10.______did you do at the weekend?
I visited the Great Wall. ( How, Why , When ,Where, What, Who)
11._______didi you go? I went to the Great Wall. ( How, Why , When ,Where, What, Who)
12.Don’t ______,please. (shout, shouts, shouting)
13.In the past, he _____very far. (jump, jumps, jumping)
14.Lingling _____me at the zoo yesterday. (meet, met)
15. Last Saturday I _____with Amy in the zoo. I like ______with her. (skip, skips, skipping, skipped)
16. ___time do you get up? (what, who, where) I get up ____half past six___the morning. (in ,at)
17.Where did you _____ your book? I ____it in the bedroom. (find, finding, found)
18.You can ____the ball well . (catch, catches,catching)
19. My school ____ at eight o’clock every morning. (start, starts ,starting,started)
20. I ____a football game last week. (win, won )
21.The bell _______ at seven o’clock every day, but yesterday it _____ at eight o’clock.
22.She argued with her friend. She feels ______(sad, angry, bored)
23.Her mother is ill in hospital. She feels ______(sad, angry, bored)
24._______people are there in your family? (how much, how many)
There ____five. (am, is ,are ,was, were)
25.The girl is deaf, she can’t ________(hear, see),This dog _____her. (help,helps, helped)
26.Is she ______sad? Yes, she is. (feel, feels, feeling)
27. What do you do at three o’clock? A. I have Music. B. I had Music.
28.Yesterday, I washed all the clothes, I ____ tired. ( am, is ,are, was, were)
29.Did they ______chess yesterday? No, they ____football. (play, plays, played)
30. What’s the matter ______you ? （at，with，for）I _____my new ruler.(lose, lost)
Mum ______(buy, bought)it _______(to, for, of )me.
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二次根式易错题难题 1、当a 时， 有意义 2、计算： 3、计算： 4、计算： (a >0,b >0,c >0) 5、计算： = = 6、 7、 则 2006个3 2006个4 8、 9、观察以下各式： 利用以上规律计算： 10、已知 一、选择题 11、若32+x 有意义，则 ( ) A 、 B 、 C 、 D 、 12、化简 的结果是 ( ) A 、0 B 、2a -4 C 、4 D 、4-2a 13、能使等式 成立的条件是 ( ) A 、x ≥0 B 、x ≥3 C 、x >3 D 、x >3或x <0 14、下列各式中,是最简二次根式的是 ( ) A 、x 8 B 、b a 25 C 、2294b a + D 、 15、已知 ,那么 的值是 ( ) A 、1 B 、 -1 C 、±1 D 、4 16、如果 ，则a 和b 的关系是 ( ) A 、a ≤b B 、a b 17、已知xy >0，化简二次根式 的正确结果为 ( ) A 、 B 、 C 、 D 、 18、如图，Rt △AMC 中，∠C=90°， ∠AMC=30°，AM ∥BN ，MN=2 cm ， BC=1cm ，则AC 的长度为 ( ) A 、23cm B 、3cm C 、3.2cm D 、 19、下列说法正确的个数是 ( ) ①2的平方根是 ；② 是同类二次根式； ③ 互为倒数；④ A 、1 B 、2 C 、3 D 、4 20、下列四个算式，其中一定成立的是 ( ) ① ； ② ； ③ ④ A 、①②③④ B 、①②③ C 、①③ D 、① 三、解答题 21、求 有意义的条件(5分) 22、已知 求3x +4y 的值 23、化简625①- ②627- 24、在实数范围内将下列各式因式分解 ① ② ③ ④ 25、已知实数a 满足 ，求a -20052的值 26设长方形的长与宽分别为a 、b ，面积为S ①已知 ；②已知S= cm 2,b = cm,求 a 27、①已知 ； ②已知x = 求x 2-4x -6的值 28、已知Rt △ABC 中，∠ACB=90°，AC=22cm ， BC=10cm ，求AB 上的高CD 长度 29、计算： 30、已知 ，求① ；② 的值 ()=-231）（a -1()= 2232）（=c b a 2382）（= +=+=+222222444333443343，，= +22444333 = +-20062005)12()12(()= +??? ??++++++++12006200520061341 231 121 23 -≥x 23 -≤x 32-≥x 3 2-≤x 2)2(2-+-a a 33-=-x x x x 2 y 51 =+x x x x 1-12122-=+-?-b ab a b a 2x y x -y y -y -y --3M A N B cm 323 a a 2.05与21212+-与3223--的绝对值是11222+=+a a ）（a a =2）（0>?=a b b a ab 11)1)(1(-?+=-+x x x x 11+-x x 214422-+-+-=x x x y 3322+-x x 752-x 44-x 44+x a a a =-+-200620057250S cm b cm a ，求，1022==C A B D ()()()()121123131302-+-+---+
超全2021年中考英语选择易错题集锦和练习含答案
2021年中考英语选择易错题集锦 1. It is _______ outside. Let’s put on our raincoats and go out, Tom. A. cold B. hot C. sunny D. rainy 【解析】此题易误为A。因为这里有个put on短语，如果不注意raincoats这个词那就很可能草率地选择A。raincoats是“雨衣”的意思，而不是一般的衣服，那么不是因为外面“冷”，而是因为“下雨”才穿“雨衣”。正确答案为D。 2. —_______ do you _______ about spring? —The flowers and the green trees. A. How, like B. How, think C. What, think D. What, like 【解析】此题陷阱选项为A或B或C。这是由于忽略语境造成的。由答语The flowers and the green trees. 可知，所问的是“你喜欢春天的什么?”而不是“你觉得春天怎么样?”。正确答案为D。 3. —What’s your sister like? —_______. A. She is a worker B. She likes pears C. She is very thin D. She is like her father 【解析】此题陷阱选项为B或D。有很多考生一看题干中的like一词就会想当然地选择B或D。其实，问句的意思是“你姐姐长得怎么样?”因此，正确答案为C。What’s …like? 这个句型常常用来询问某人的长相或某事的情况(包括天气情况)。
译林版牛津小学英语五年级上册错题集
Unit1 Goldilocks and the three bears 一、用所级单词的适当形式填空。 1.There(be)many apples in the basket. 2.My mother is sitting in front of(she). 3.There aren’t(some)sofas in the bedroom. 4.There(be)some soup in the fridge. 5.There isn’t any(coffee) there. 6.I can see the park is between(they). 7.There(be) a pen and two pencils on the desk. 二、请你用所学的句型“There is / are…和This…is too…”来简单介绍一下你的卧室。（至少写10句话） My bedroom Unit2 A new student 一、用is, are , isn’t , aren’t填空 1. There ______ a spoon on the plate. 2. There ______ some milk on the table. And there _______ any coffee here . 3. There ______ some clouds in the sky. There ______ some boats on the river. 4. There ______ any knives in the box. 5. There ______ a sofa in the living room. 6. ______ there any books in the room? Yes, there ______. 7. There ______ a policeman in the kitchen. 8. There ______ 60 minutes in an hour. 9. There ______ a pencil, a ruler and two books on the desk. 10. There ______ two glasses and a cup on the table. 11. What ________ in this box? There is a present in it. 12. What _______ in that box ? There are two clothes in it. 二、用some, any填空 1. There’s ______ water in the cup. There isn’t ______ tea in the cup. 2. Is there ______ bread here ? Yes , there is . There’s ______ on the table. 3. Are there ______ cars in front of the building? No, there aren’t. 4. There isn’t _____ chocolate on the table. 5. Is there ______ soup on the table? 三、用there be的适当形式填空： 1. ____________ a bookcase in the study room . 2. ______ a sofa and two beds in the bedroom 3. ______ two beds and a sofa in the bedroom 4. ______ some milk in the glass .
二次根式单元 易错题难题提优专项训练试题
一、选择题 1．下列二次根式中是最简二次根式的为（ ） A ．12 B ．30 C ．8 D ． 12 2．下列计算正确的是（ ） A ．93=± B ．8220-= C ．532-= D ．2(5)5-=- 3．在函数y= 2 3 x x +-中，自变量x 的取值范围是（ ） A ．x≥－2且x≠3 B ．x≤2且x≠3 C ．x≠3 D ．x≤－2 4．如图，是按一定规律排成的三角形数阵，按图中数阵的排列规律，第9行从左至右第5 个数是（ ） 1232567 22 310 A ．210 B ．41 C ．52 D ．51 5．实数a ，b ，c ，满足|a |+a =0，|ab |=ab ，|c |-c =0，那么化简代数式2b -|a +b |+|a -c |-222c bc b -+的结果为（ ） A ．2c -b B ．2c -2a C ．-b D ．b 6．下列二次根式中，与3是同类二次根式的是（ ） A ．18 B ． 13 C 24 D 0.3 7．设0a >，0b >( 35a a b b a b =23ab a b ab ++的值是 （ ） A ．2 B ． 14 C ． 12 D ． 3158 8．下列计算正确的是（ ） A 1233= B 235= C ．43331= D ．32252+= 9．给出下列化简①（2-）2=222-=（）2221214+=3
1 2 =，其中正确的是（ ） A ．①②③④ B ．①②③ C ．①② D ．③④ 10．下列运算一定正确的是( ) A a = B = C ．222()a b a b ?=? D ()0n a m = ≥ 二、填空题 11．已知x =( )21142221x x x x -??+?= ?-+-??_________ 12．若0a >化成最简二次根式为________． 13．若m m 3﹣m 2﹣2017m +2015＝_____． 14．定义：对非负实数x “四舍五入”到个位的值记为()f x z ， 即：当n 为非负整数时，如果11 22 n x n -<+≤，则()f x n =z ． 如：(0)(0.48)0f f ==z z ，(0.64)(1.49)1f f ==z z ，(4)(3.68)4f f ==z z ， 试解决下列问题： ①f =z __________；②f =z __________； + =__________． 15．3 =，且01x <<=______． 16．甲容器中装有浓度为a ，乙容器中装有浓度为b ，两个容器都倒出m kg ，把甲容器倒出的果汁混入乙容器，把乙容器倒出的果汁混入甲容器，混合后，两容器内的果汁浓度相同，则m 的值为_________． 17．把 18．=== 据上述各等式反映的规律，请写出第5个等式：___________________________． 19．a ，小数部分是b b -=______. 20．1 =-=
初三英语中考难题易错题汇总系列(一)
初三英语中考难题易错题汇总系列(一) A. The; a B. A; the C. The; / D. The; the ( )2. --- Must I go home now? ---No, you _____. You _____ sit here for a moment. A. needn’t ; must B. mustn’t; have to C. needn’t to ;must D. don’t have to ; can ( )3. It wasn’t long_________ the rain stopped and the sun came out again. A. until B. before C. when D. since ( )4. —You don’t know me, do you? —________. Don’t you remember ________ the mountain with us last weekend? A. No; climbing B. No; to climb C. Yes; climbing D. Yes; to climb ( )5. Could you tell me_____? A. what she had done with the camera. B. how we can call this lady C. what is wrong with the watch D. which city we should go ( )6. It’s a good habit to ______ all your things in correct places. A. put away B. put up C. put out D. put off ( )7. It’s an international school ,_____of the students ___from foreign countries. A. two-third; are B. second-thirds; is C. two-thirds ;are D. two-three; is ( )8. She______ for 15 years, yet she didn’t know what kind of man she ______. A. had married; married B. had been married; married to C. had been married; had married D. married; had married to ( )9. Many new houses have been provided ______ people in Sichuan ________. A. to, to live in B. for, to live C. with, to live D. for, to live in ( )10.. I’d like to find______ to read on the journey, and_______ will do. A. something, everything B. something, something C. anything, everything D. something, anything ( )11. Though they are ______little children , they have worked out _______many difficult math problems.