题一：When I saw Mary, she ______ the piano.
A. is playing B. plays C. was playing D. played
题二：---Is there anything wrong, Bob? You look sad.
---Oh, nothing much. In fact, I ______ of my friends back home.
A. have just thought B. was just thinking C. would just think D. will just be thinking
题三：Teenagers ______ their health because they play computer games too much.
A. have damaged B. are damaging C. damaged D. will damage
题四：We have to put off the sports meeting because it _______ so hard.
A. is raining B. rains C. are raining D. is rained
题五：---It was really very kind of you to give me a lift home.
---Oh, don't mention it. I _____ past your house anyway.
A. was coming B. will come C. had come D. have come
题六：I _____ there yesterday, but it rained cats and dogs.
A. have gone B. will go C had gone D. was going
题七：He said the train _______ at six the next morning.
A. leave B. had left C. was leaving D. is left
题八：We _________ very early tomorrow morning. So we went to bed early.
A. were starting B. started C. had started D. are starting
题九：Cathy is taking notes of the grammatical rules in class at
A. studies B. studied C. is studying D. has been studying
题十：–I have got a headache.
–No wonder. You ____ in front of that computer too long.
A. work B. are working C. have been working D. worked
题十一：---Did Alan enjoy seeing old friends yesterday?
---Yes, he did. He _____ his old friends for a long time.
A. didn’t see B. wouldn't see C. hasn't seen D. hadn't seen
题十二：When he retired last year, he ________ in that company for 40 years.
A. worked B. is working C. had worked D. has worked
题十三：If
A. had discovered B. had been discovered C. has discovered D. has been discovered
题十四：Professor James will give us a lecture on the Western culture, but when and where _____ yet.
A. hasn't been decided B. haven't decided C. isn't being decided D. aren't decided
题十五：I got caught in the rain and my suit _____.
A. has ruined B. had ruined C. has been ruined D. had been ruined
题十六：With the help of high technology, more and more new substances _____ in the past years.
A. discovered B. have discovered C. had been discovered D. have been discovered
题十七：What _____ if I drink this?
A. happens B. is happening C. will happen D. is happened
题十八：---How can I apply for an online course?
---Just fill out this form and we _____ what we can do for you.
A. see B. are seeing C. have seen D. will see
题十九：All visitors to this village _________ with kindness.
A. treat B. are treated C. are treating D. had been treated
题二十：The employees ______ on 15th every month in that company.
A. pay B. are paying C. are paid D. are being paid
题二十一：The letters for the boss___________ on his desk but he didn’t read them until three days later.
A. were put B. was put C. put D. has put
题二十二：In the past, women __________ down upon and were treated badly.
A. were looked B. were looking C. were look D. are looked
题二十三：If everything _________, things will go on well.
A. does B. had been done C. will do D. is done
题二十四：If he ______ the news, he will be very excited.
A. are told B. tells C. is told D. is telling
题一： C
解析：本句意为：当我看见Mary的时候，她正在弹钢琴。
when引导的是具体的过去时间，主句要用过去进行时。
题二： B
解析：本句意为：--有问题吗，Bob？你看起来很伤心。--奥，没有什么，实际上，我只是想起了我家乡的朋友。
此处表示刚才看起来伤心的时候的动作，表示当时想起。
题三： B
解析：本句意为：因为青少年玩的游戏太多，所以他们正在毁坏他们的健康。
根据because引导的原因状语从句中的时态一般现在时可知此处指的是现在的情况，所以要用现在进行时。
题四： A
解析：本句意为：我们不得不推迟我们的运动会，因为正在下大雨。
根据主句的现在时可知此刻正在下大雨，所以要用现在进行时。
题五： A
解析：本句意为：--让我搭便车回家，真是太感谢你了。--奥，没有关系，我不管怎么样也要经过你的家的。此处表示当时打算经过，所以要用过去进行时。
题六： D
解析：本句意为：我本来昨天打算去的，但是下着倾盆大雨。
此处用过去进行时表示一种过去的打算，表示一个过去的一种打算。
题七： C
解析：本句意为：他说火车在明天早上六点将会出发。因为火车出发时间是固定的，是不可改变的，所以此处要用进行时态表将来的用法。从“said”可以判断时间是发生在过去，所以要用过去将来时。
题八： A
解析：本句意为：明天早上我们要早点出发，所以我们很早就上床了。
此处表示过去的将来动作，可以使用过去进行时表示过去将来。
题九： D
解析：本句意为：Cathy正在阳光学校记录语法规则，她学英语有一年了。
根据前一句可知现在仍然在学习，学习英语是一个持续了一年而且到现在的动作，所以用现在完成进行时。
题十： C
解析：本句意为：--我头疼。--难怪，你在电脑前面工作时间太长了。
头疼的原因就是在电脑前面工作头疼而且是和现在有关系，而且强调一直在进行，所以要用现在完成进行时。
题十一： D
解析：本句意为：--昨天Alan看见他的朋友高兴吗？--是啊，他很长时间没有见到他的老朋友了。
见到他的朋友的动作发生在昨天，很长时间没有见面这个动作发生在昨天见面之前，所以要用过去完成时。
题十二： C
解析：本句意为：当他去年退休的时候，他在那家公司已经工作了40年。
此处在那家公司工作40年是发生在去年退休这个动作之前，是过去的过去，所以要用过去完成时。
题十三： C
解析：本句意为：如果牛顿生活在今天，他会对在科学技术方面的发现感到惊讶的。
此处if从句以及主句是虚拟语气，但是今天的科学技术的成就不是虚拟语气，而是到目前为止的成就，所以要用现在完成时。
题十四： A
解析：本句意为：James教授将给我们做一个关于西方文化的讲座，但是何时何地还没有做出决定。
此处表示到目前为止，所以要用现在完成时。
题十五： C
解析：本句意为：我淋雨了，西装毁了。
后面的这个动作是前面这个动作产生的结果，而且my suit和ruin之间构成被动关系，所以要用现在完成时的被动语态。
题十六： D
解析：本句意为：在高科技的帮助下，更多的新的物质在过去的几年里被发现。
在过去的几年里做时间状语，主句中要用现在完成时。
题十七： C
解析：本句意为：如果我喝了这个会发生什么事情？
if从句是用一般现在时表示的是将来，所以主句要用一般将来时。
题十八： D
解析：本句意为：--我怎么申请在线课程？--填一下这个表格，然后我们看一下我们能为你做什么。
做什么指的是填完表之后做什么，表示的是将来动作，所以后面要用一般将来时。
题十九： B
解析：本句意为：到这个村庄的所有的游客都被很好地对待。
此处指的是一般情况，所以用一般现在时，而且游客和treat之间构成被动关系，所以要用一般现在时的被动语态。
题二十： C
解析：本句意为：在那家公司都是在每月15日发工资。
此处指的是一般情况，所以要用一般现在时，而且员工和pay之间是被动关系，所以要用一般现在时的被动语态。
题二十一： A
解析：本句意为：给老板的信被放在他的桌子上，但是直到三天后他才读。,
此处指的是过去的事情，而且信和放置之间构成被动关系，主语letters是复数，所以后面要用复数谓语动词。
题二十二： A
解析：本句意为：过去，妇女被看不起并且被虐待。
此处指的是过去，而且妇女和look down upon之间构成被动关系，所以要用一般过去时的被动语态。
题二十三： D
解析：本句意为：如果一切都做好的话，事情就顺利了。
if引导的条件状语从句中要用一般现在时表示将来，而且everything和do之间构成被动关系，所以要用一般现在时的被动语态。
题二十四： C
解析：本句意为：如果他被告诉这个消息的话，他会非常激动的。
if引导的条件状语从句中要用一般现在时表示将来，而且he和tell之间构成被动关系，所以要用一般现在时的被动语态。