根据题意，选择最佳答案，或者选取最合适的答案。

1. Anna is going to be a ______ because she likes studying medicine.
   pianist doctor
解析：解析试题分析：A钢琴家；B医生；句意：Ann将来想成为一名医生，因为她喜欢研究医学。结合语境选B。 考点：考查情名词辨析。
2. After gunshots fired on campus, there is a growing _________ about safety among teachers and students.
   power concern
解析：解析试题分析：考查名词辨析。A. 力量；B. 关心；自从枪击事件之后，人们对师生的安全越来越关注。故选B。 考点：考查名词辨析
3. He didn’t understand French, so I offered to _____ for him.
   report translate
解析：试题分析：report报告；provide提供；translate翻译；realize实现，认识到。句意：他不懂法语，因此我为他提供翻译。故选B。
4. There are many differences between American English and British English in spelling and pronunciation, especially in _____ English.
   written oral
解析：试题分析：written English 手写英语；oral English英语口语，official English官方英语，公务英语；business English 商业英语，根据题意可知选B。
5. They lost the match, ______ we know they did their best.
   and but
解析：句意：他们输了比赛，但是我们知道他们尽力了。A. and并且，并列关系；B. but但是，表示转折关系根据两句的关系，故选B。
6. ___ TV do you watch every day?
   How many How much
解析：试题分析： B. How long 多长时间，多时间段提问； C. How much 多少，修饰不可数名词，对数量提问；TV表示电视节目，是不可数名词，故用how much来提问。故选B。
7. This book is really interesting. Could you ____ it to me?
   lend show
解析：句意：这本书真的很有趣，你能把它借给我吗? A. lend借show展示。根据句意故选A。
8. Your desk is big. Could you _____________ for me?
   make a room make more space
解析：句意你的桌子是大的。你能给我提供我一个地方吗？分析：表示空间的名词为space, room.此时为不可数名词，结合选项第三项正确。故选B
9. Xi’an is one of __ capital ___in China.
   older the oldest; cities
解析：试题分析：句意：西安是中国最古老的首都之一。表示“最……之一”的句式：one o f+ the+形容词最高级 + 名词复数。故本题选B
10. I’m going to write articles and them to magazines and newspapers
    send take
解析：句意：我打算写文章，并且把它们寄给杂志和报纸。A. send派寄送；B. take拿走；带走结合句意，故选A.
11. The green shorts____ 30 yuan. 。
    is on sale are on sale for
解析：句意：那件绿色短裤卖30元。On sale for 钱 ，以多少钱出售。根据语意故选B
12. His uncle taught him ___ many _____instruments when he was very young.
    to play, musical to play, music
解析：解析试题分析：句意：他的叔叔在他小的时候教他弹奏很多乐器。第一空“教给某人做某事”是teach sb. To do sth.；第二空“乐器”应是musical instruments，故选A。 考点：考查非谓语动词及形容词的用法
13. US First Lady Michelle Obama encouraged students to study abroad in her when visiting Peking University on March 22, 2014.
    story speech
解析：试题分析：Story故事； speech演讲 所以选B。
14. All the students like Miss Green because she always makes her class ___
    ．lively and interested lively and interesting
解析：题分析：句意：所有的学生喜欢格林老师，因为她总是让她的课有趣。interested有趣的，修饰人；interesting有趣的，修饰物；interest兴趣，名词，引起兴趣，根据动词短语make +宾语+形容词，这里形容词作宾语补足语；故选B.
15. Our car ___ on the way; several villagers helped us push it to the nearest garage.
    broke down broke up
解析：解析试题分析：考查break的相关短语。选项A意为抛锚，身体垮掉选项B意为分手，分解；选A。
16. The film star was surrounded by the audience __he stepped off the stage
    ．at once the instant.
解析： 试题分析：考查词义辨析。句意：影视巨星一走下舞台就被观众包围了起来。instantly 一…就… ，at once 立即马上的意思此刻的意思，显然只有B合意。故选B。
17. At the opening_ _of the school, our headmaster gave a short speech.
    ceremony form
解析：解析试题分析：考查名词词义辨析。Ceremony庆典，仪式；form形式句意：在学校的学习典礼上，校长做了一个简短的发言。根据句意可知A正确
18. Tom isn’t happy today. Do you know the_____? His dog is ill. That makes him sad.
    why reason
解析：句意:-Tom今天不开心。你知道原因吗？-他的狗生病了。那让他很伤心。why为什么 根据对话的意思可知，这里问的是Tom不开心的原因。故选B。
19. After class, students ______ clean the chalk off the blackboard.
    was excepted to are supposed to
解析：句意：下课后，学生们应该把黑板上的粉笔字擦下来。A. was excepted to例外；B. are supposed to应该 结合句意，故选B
20. ______ do you read English newspapers? I read 21st Century every day.
    How long How often how often
解析：解析：提问频率；how long提问多久 句意：你多长时间读一次英文报纸？——我每天读21世纪报。结合语意可知选B