Question

各位，有几道英语题始终弄不明白，请帮帮忙。。。谢谢~

41.our classroom must be made_____all the time.
A.clean B.to clean C.cleaning D.cleans
44.the students_________an english class at 10:00 yesterday morning.
A.having B.were having C.had had D.had
52.you______worry about your son. He will be well soon.
A.needn’t to B.need to C.don’t need D.don’t need to
53.the famous professor taught us________ourselves.
A.how to train B.want to train C.how train D.what train
56.please tell him to call me__________.
A.as fast as possible B.as quick as possible
C.as quickly as possible D.as soon as possible
62.you mustn’t give up studying foreign languages for even a day. This underlined part means_______.
A.stop trying to do something B.continue C.hand up D.try

请您详细告知解题原因。。。谢谢！

Answer 1

1.B,被动语态中的to要还原
2.B，有明确时间用过去进行时
3.D，needn't是情态动词否定，不加to。don't need是动词,必须加to
4.A，有宾语ourselves，所以用how不用what。（how to do sth./what to do)
5.D，一般都这么说http://zhidao.baidu.com/question/6987345.html
6.划线的应该是mustn’t give up吧，C，一定不放弃。
A是放弃（stop doing停止做某事，stop to do停止当前去做某事）

Answer 2

41,A clean 是形容词
44， D.had ：at 10:00 是时间点，前面要用过去式
52，D.don’t need to
53，A.how to train
56，D.as soon as possible
这里要用副词，quick是形容词；quickly 和 fast 都是表示动作快的；soon 是表示时间快的
62，下滑线部分如果是give up的话，应该选A

Answer 3

41A形容词
44D一般陈述句，过去时态即可。
52D need可以用作动词，也可以用为副词。动词要加to。
53A根据句子的意思，应该是教我们如何训练自己。
56D习语
62?下滑线在？