根据题意，选择最佳答案，或者选取最合适的答案。

1. We found some _______of rice near the hole . The mice may have stored a lot of____in the hole.
   grain;grain grains;grain
解析：解析：我们在洞里发现了一些大米的种子。可能是老鼠偷到洞里来的。
2. — Who the match? — Class1! They us 3-1.
   won, won won, bea
解析：解析试题分析：句意：-谁赢了比赛？一班，他们以三比一击败了我们。win赢，经常指赢得比赛或名词，beat赢，击败，经常指打败对手。结合句意及结构，故选B。
3. Most of the students haven’t finished their papers on time for __________reasons---one of which was that they carried out a week-long investigation in the countryside.
   previous various
解析：解析试题分析：考查形容词辨析。A. 先前的；B. 各种各样的。句意：大多数的学生因为各种各样的原因没有完成他们的论文---其中的原因之一是他们在进行为期一周的农村调查。故选B。
4. All the________indicates that he has been deeply involved in the crime.
   evidence fact
解析：解析考查名词词义辨析。句意为：所有的迹象表明他已经深陷这次犯罪。evidence迹象；fact事实；。根据句意选A项。
5. Having seen the X-ray, the doctor decided to ________ the patient.
   operate operate on
解析：解析试题分析：考查动词和动词短语：A．operate操作，经营，B. operate on给…做手术，，句意：看过X光后，医生决定给病人做手术。选B。
6. (---)The famous pianist, Langlang, will appear in the_____________. --- No wonder so many people are rushing for the tickets.
   company concert
解析：解析试题分析:句意：著名的钢琴家郎朗，将出现在这个音乐会。不用好奇有如此多的人争相购买门票。company 公司，，concert音乐会。根据句意可以看出是音乐会，因为出现了郎朗，而且有门票。故选B。
7. I tried all I could_____ the topic at the meeting, but he brought it up.
   avoided mentioning to avoid mentioning
解析：解析试题分析：考查省略和固定搭配。句意：在会议上，我用尽了一切办法来避免提到主题，但是被他提了出来。all后面是一个省略了that的定语从句，关系代词作宾语可省略，could后省略了do，不定式表示目的，故选B。
8. Nick is looking for another job because he feels that nothing he does_______ his boss.
   serves satisfies
解析：解析试题分析：考查动词辨析。句意：尼克正在寻找另一个工作因为他觉得他所的事情没有使他满意的。Serve服务；satisfy使满意；promise许诺；support支持。根据句意故选B
9. As someone ______ the curtain, the famous singer came out. The fans ______ and screamed with excitement.
   raised; rose raised; raised
解析：解析试题分析：句意：当有人拉起帷幕时，这个著名的歌星出现了。粉丝们激动地站起来，欢呼着。此题第一空根据句型结构缺少谓语动词，而且后面有帷幕这个宾语，故填及物动词raise；第二空根据句型结构and前后均为不及物动词，故选rose；结合时态两空均要使用一般过去时态。故选A。
10. It's said that ________ gains from house sales should pay the individual income tax.
    who whoeve
解析：解析试题分析：考查名词性从句。whoever“任何人；无论谁”，符合语境。句意：据说，任何通过售房获利的人都应支付个人所得税。故B正确
11. It’s selfish ________ him ________ the cakes with others.
    for; to share of; not to share
解析：解析试题分析：句意:他很自私不与别人分享蛋糕。在第一空前形容词 selfish表示的是Millie 的特点、特征或性格，后应加介词of，常用于此句型的形容词有:kind,good,nice,clever,cruel等；如果不是个人自身的特点、特征或性格时，使用介词for。故排除A,。It’s+adj+of/for+sb.+(not) to do sth对于某人来说做某事是怎么样的。Not放在动词不定式之前，故选B。
12. If he continues like this, he will ____________ a stone only to have it drop on his own foot, just as the old saying goes.
    end up to lift end up lifting
解析：解析试题分析：考查动词短语。句意：如果他继续这样，他将最后搬起石头砸自己的脚，自食后果。End up doing以。。为结束，故选B项。
13. It’s a good habit of doing your homework _________ you come home from school.
    ．if as soon as
解析：解析：句意：你一从学校回到家就写作业是个好习惯。If如果；as soon as 一……就……；根据题意，故选B。
14. I find it difficult to learn English better. _____ you don’t give up, your dreams will come true
    As long as As soon as
解析：解析试题分析：句意:-我发现学好英语很难。-只要你不放弃，你的梦想就会实现。as long as 只要；as soon as一……就……；as well as 和……一样好；还有。根据句意可知选A。
15. One’s life has value _______ one brings value to the life of others.
    so that as long as
解析：解析：考查状语从句。句意：一个人只要给他人带去价值，他的生命就是有价值的。A 以便于； B只要。根据句意可知，这里表示条件，故选B。
16. President Xi Jinping says he wants to increase ties with Belgium and with Europe _______.
    as a whole as a result
解析：解析：句意：习近平主席说他想要加强与比利时和整个欧洲的联系。A. as a whole作为整体；B. as a result结果。由句意可知选A。
17. The boy has such a big meal every day. ___________, he is getting fatter and fatter.
    However As a result
解析：解析：句意：这个男孩每天都吃很多。结果，他正变得越来越胖。解析：第一项，但是；第二项，结果；分析：他变胖是吃多的结果。故选B
18. Though he said he was a doctor, ________, he knows nothing about medicin.
    as a matter of fact as well
解析：解析：考查词组：A. as a matter of fact事实上，B. as well 也，句意：虽然他说他是医生，但是他对医学一窍不通。选A。
19. What —— did they ——yesterday? —The plan for the National Holidays.
    other, argue else, argue about
解析：解析：句意：—昨天他们还争论了别的什么？— 国庆假期计划。else,可以放在疑问词what 之后，other不能. argue争辩;argue with和……争论；argue about争论……。选B
20. After 15 years in the USA, he finally decided to ________ American citizenship
    concentrate on apply for
解析：解析：A. concentrate on全神贯注于，B. apply for申请，句意：--在美国15年后，他最后决定申请美国公民。根据句意选B。