新概念125英语题，求助！！

Question

选择填空
( ) 1. You needn’t ______for me.
A. wait B. waiting C. waits D. to wait
( ) 2. You have to ______ me the truth.
A. telling B. tells C. told D. tell
( ) 3. Don’t _______others while they are in trouble.
A. laugh B. laugh at C. laughing D. laughed
( ) 4. A dog is _______ after a ball now.
A. run B. running C. runs D. /
( ) 5. He gets up early every morning. Now he______ breakfast.
A. is cooking B. cooks C. cooking D. cook
( ) 6. How ______ is it from Nanjing to Beijing？
A. long B. far C. many D. much
( ) 7. What______ your son doing? He _____his homework now.
A. are , writes B. is; does C. is; is doing D. are; is doing
( ) 8. She buys some vegetables on ______way home.
A. she B. her C. hers D. me
用must, have to(has to), have had to, mustn’t, needn’t填空
1. The last bus has left. We will ____________walk home.
2. You______ talk loudly in the library.
3. Do you _________get up early in the morning?
4. I ___________wait for you for two hours.
5. She has no bike, so she __________walk to work from Monday to Friday..
6. You ________tell her to come. She has gone to Shanghai.
7. You _______be honest.
8. You _________be more careful.
麻烦各位高手啦，最好要有一定的解释，好滴加悬赏嘞~

Answer 1

第一部分：
1.A，这里的need为情态动词，后面跟原型就可以了； 2. D, have to do sth； 3. B, 否定句中用原型，laugh at sb about sth；4. B，be doing sth,虽然be after也存在一定的语义，但是鉴于主语是狗，还是选个不那么人性化的选项吧； 5. A，现在时be doing sth； 6. B，询问距离远近的常用搭配，how far is it from A to B； 7. C， 现在进行时； 8. B，on sb's way somewhere/to some place
第二部分：
1. have to, 根据语义是不得不，表示没有选择余地；
2. mustn't, 表示不可以；
3. have to
4. have had to, 有抱怨成分
5. has to，同1；
6. needn't, 她已经去上海了，所以你没必要让她来；
7. must，一种教导语气（很可能是一厢情愿滴），must do即可；
8. must,同上

Answer 2

1.d need/needn't to do something固定词组！需要做某事
2.d have to do something 固定词组 不得不做某事
3.b don't +动词原型 所以是laugh ， laugh at somebody 嘲笑某人 固定词组
4.b is doing sth 正在做某事！还有后面有now
5.a 前面有now 说明正在做某事 be+doing sth
6.b far 表示距离多远
7.c 问题中有 doing， son 是第三人称单数 所以用is, 问题是现在进行时，所以也要用现在进行时回答 he is doing his homework now. 他正在做作业
8.b 主语是she，排除d，并且要用宾格！所以是her

1. have to 不得不做某事
2. mustn't 语气强烈 不能做某事
3.must 你明天必须要早起吗？
4. have had to 表示现在完成时，后面用了介词for 表示一段时间
5.has to, she第三人称单数， 前面有原因，所以用has to 表示不得不
6.needn't to 表示不需要，因为她已经去上海了
7. must 必须
8. must 你必须要更仔细

好啦！亲！！ 不懂的再问吧！！打的很辛苦。。。