21.—Are you going to take part in the speech contest?

　　—________ It's too good an opportunity to miss.

　　A. No problem! B. That's for sure.

　　C. Why me? D. Why bother?

　　[解析]句意：——你计划参加演讲比赛吗?——那当然。这个机会很难得，不能错过。No problem!用来回答感谢或要求，意为：不成问题，没关系;That's for sure.对上文或对方所说的话表示肯定，意为：当然;Why me?为什么是我呢?Why bother?为什么浪费时间(精力)?根据句意可知答案为B项。

　　[答案]B

　　22.—Do you have Mary's phone number?

　　—Sorry, ________.

　　A. I don't know B. forget it

　　C. here you are D. I can't remember it

　　[解析]句意：——你有玛丽的电话号码吗?——对不起，我记不起来了。A项(我不知道)为汉语式英语，故被排除;B：没关系，不必在意，别提了;C：给你。以上三项均不符合句意，故被排除。只有D项(我记不起来了)符合本题要求，故为答案。

　　[答案]D

　　23.—I'm sorry I didn't finish it on time.

　　—________.

　　A. Fine, thanks. B. No, thanks.

　　C. Thanks a lot. D. Thanks anyway.

　　[解析]句意：——对不起，我没有按时完成它。——不过，还是得谢谢你。四个选项：A用于应答对方的问候：很好，谢谢;B用于谢绝对方的邀请或帮助：不用了，谢谢;C表示感谢对方：多谢了;D用于表示对方没能帮上忙的时候作为礼貌回答：不过，还是得谢谢你。从语境的连贯看，对方已经道歉没有按时完成它，这里应该选D表示感谢对方的辛劳。

　　[答案]D

　　24.—How could you be so rude as to walk in here in the middle of my class?

　　—________

　　A. Nothing much. B. Nothing serious.

　　C. Never again. D. Never mind.

　　[解析]句意：——你怎么这么没礼貌，我的课上到一半的时候你就这么走进来了?——我再也不这样做了。四个选项的含义：A：不很多，不太重要，价值不太大(not a great amount of sth.;nothing of great value or importance);B：没什么大不了的;C：再也不这样了;D：没关系，别介意。从语境的连贯判断选C，表示“再也不这样做了”。

　　[答案]C

　　25.—Everybody is going to climb the mountain. Can I go too, mom?

　　—________ Wait till you are old enough, dear.

　　A. Will you? B. Why not?

　　C. I hope so. D. I'm afraid not.

　　[解析]句意：——大家都要去爬山。妈妈，我也可以去吗?——恐怕不行。等你再长大些吧，宝贝儿。从语境“等你再长大些”可知，本空用否定回答，选D。Will you?好吗?Why not?为什么不?I hope so.我希望如此。都不符合语境。

　　[答案]D

　　26.—Was he sorry for what he'd done?

　　—________.

　　A. No wonder B. Well done

　　C. Not really D. Go ahead

　　[解析]句意：——他对自己所做的感到抱歉吗?——并不真是那样。No wonder 难怪;Well done 干得好，表现不错;Not really 不全是，并不是真的;Go ahead 用吧。由句意可知C项正确。

　　[答案]C

　　27.—Do you think you could do without help?

　　—________. This is not the first time for me.

　　A. Take care B. Hurry up

　　C. Not exactly D. Don't worry

　　[解析]句意：——你认为没人帮助你能行吗?——别担心，这对我来说不是第一次。take care 小心，表示提醒;hurry up 赶快，表示催促;not exactly 不确切;don't worry 别担心。故选D项。

　　[答案]D

　　28.—Her father is very rich.

　　—________ She wouldn't accept his help even if it were offered.

　　A. What for? B. So what?

　　C. No doubt. D. No wonder.

　　[解析]句意：——她爸爸很富有。——那又怎么样?她不愿接受他的帮助，即使这帮助是她爸爸主动提供的。What for?相当于 For what reason?或For what purpose?用来提问目的或原因;So what?那又怎么样?表不以为然;No doubt.毫无疑问，表判断;No wonder.难怪，表恍然大悟。

　　[答案]B

　　29.—Excuse me, I wonder if you can help me.

　　—Sure. ________?

　　A. What help B. What is this

　　C. What is it D. What do you want

　　[解析]句意：——打扰一下，可以帮我个忙吗?——当然，什么事?A项为汉语式英文，为干扰项;B项：这是什么?D项：你想要什么?C项在此处表示询问对方“什么事?”

　　[答案]C

　　30.—Professor Johnson, I'm afraid I can't finish the report within this week.

　　—________. How about next week?

　　A. Good for you B. It won't bother me

　　C. Not at all D. That's OK

　　[解析]句意：——Johnson 教授，恐怕本周我不能完成我的报告了。——没关系。下周如何?学生对不能如期完成作业感到抱歉，老师表示通融。A：对你来说很好;B：不会麻烦我;C：一点也不;D：没关系。

　　[答案]D

　　31.—Do you think their table tennis team will win the first place at the coming Asian Games?

　　—________. Ours is much stronger than theirs.

　　A. Of course B. It depends

　　C. Don't mention it D. By no means

　　[解析]句意：——你认为他们的乒乓球队在即将到来的亚运会上会获得冠军吗?——绝对不会，我们的球队比他们的球队要强大得多。Of course 当然可以;It depends 视情况而定;Don't mention it 不用谢;By no means 绝对不会，绝不。根据句意可知答案为D项。

　　[答案]D

　　32.—I have tried very hard to find a solution to the problem, but in vain.

　　—Why not consult with Frank? You see, ________.

　　A. great minds think alike

　　B. two heads are better than one

　　C. a bird in the hand is worth two in the bush

　　D. it's better to think twice before doing something

　　[解析]句意：——我已经非常努力地去寻找解决那个问题的方法了，但是白费力气了。——你怎么不和 Frank 商量一下?你知道，三个臭皮匠顶个诸葛亮。A项意为“英雄所见略同”;B项意为“三个臭皮匠顶个诸葛亮”;C项意为“一鸟在手胜过双鸟在林”;D项意为“三思而后行”。根据句意可知答案为B项。

　　[答案]B

　　33.—What's the noise? It sounds as if it comes from upstairs.

　　—________. It must be the window­cleaner working next door.

　　A. I'm not sure B. I hope not

　　C. I'd rather not D. I don't think so

　　[解析]句意：——怎么会有噪音呢?听起来好像是来自楼上的。——我认为不是。一定是隔壁有保洁人员在擦窗户。A：我没把握;B：我希望不会;C：我宁愿不;D：我认为不是。根据答语中的 must 可知设空处要表达对上文的否定，故答案为D项。

　　[答案]D

　　34.—What a fine day! Shall we go picnicking?

　　—________. But we need to be home before six o'clock for the football match.

　　A. Have a nice time B. Pardon me

　　C. That's great D. You are right

　　[解析]句意：——多么好的天气啊!我们去野餐好吗?——太好了。但是我们需要在六点钟以前赶回家看足球赛。A：祝你玩得愉快;B：对不起;C：好极了，棒极了，表示赞同对方的观点和看法;D：你是正确的。

　　[答案]C

　　35.—Do you enjoy your present job?

　　—________. I just do it for a living.

　　A. Of course B. Not really

　　C. Not likely D. Not a little

　　[解析]句意：——你喜欢现'在的工作吗?——不怎么喜欢。只是为了谋生而已。not really：used to say‘no’or‘not’in a less strong way;of course 当然;not likely 绝不可能，绝对不会;not a little 相当于 very (much)。根据句意选B。

　　[答案]B

　　36.—Would she mind playing against her former teammates?

　　—________ She is willing to play against any tough players.

　　A. I think so. B. I'm not surprised.

　　C. Of course. D. Not likely!

　　[解析]句意：——她介意与她的前队友比赛吗?——不可能介意的!她愿意与任何一个难缠的对手比赛。I think so. 意为“我认为如此”;I'm not surprised.意为“我不感到惊讶”;Of course.意为“当然可以”;Not likely!意为“不可能”。根据句意可知答案为D项。

　　[答案]D

　　37.—According to my grandma，it is a good idea to eat chicken soup when you have a cold.

　　—________， scientists agree with her.

　　A. Sooner or later B. Once in a while

　　C. To be exact D. Believe it or not

　　[解析]句意：——据我奶奶说，感冒时喝鸡汤是个不错的主意。——信不信由你，科学家们也同意她的看法。sooner or later 迟早;once in a while 偶尔;to be exact 准确来说;believe it or not 信不信由你。D项符合句意。

　　[答案]D

　　38.—Do you know if Linda is willing to take charge of the program?

　　—________， does it?

　　A. It takes no time B. It counts for nothing

　　C. It doesn't hurt to ask D. It doesn't make sense

　　[解析]句意：——Linda 是否愿意负责这个项目，你知道吗?——问一下她也没什么不便，不是吗?it won't/doesn't hurt(sb.)to do sth.：spoken said when you think someone should do something or that something is a good idea 做某事不会有什么害处或不便。本题易误选D(It doesn't make sense 这没什么意义)，但D答非所问，故排除。

　　[答案]C

　　39.—________?

　　—That would be great! Please drop me off at the library.

　　A. Could you bring me the bill

　　B. Would you like me to give you a lift

　　C. Could you tell me the postcode for Paris

　　D. Would you like to have my e­mail address

　　[解析]句意：——你愿意搭我的便车吗?——太棒了!请把我捎到图书馆。由题干中的 Please drop me off at the library 可知B符合句意要求。

　　[答案]B

　　40.—I'll do the washing­up. Jack, would you please do the floors?

　　—________.

　　A. Yes, please B. No, I don't

　　C. Yes, sure D. No, not at all

　　[解析]句意：——我要洗碗。Jack，你能负责擦地板吗?——当然可以。当肯定回答别人提出的请求时，可以说 sure;of course;with pleasure 等等。拒绝别人应表示歉意(sorry)。A回答需要对方行动的请求，如：Would you like some tea?B语气生硬，不符合英语习惯;D回答 Would you mind... 提问。所以选C。

　　[答案]C