1.Since nobody gave him any help,he have done the research on his own.
A.can B.must
C.would D.need
解析:句意:既然没有人给他任何帮助,那他一定是独自完成的这项研究。must在此处表示对过去情况的肯定猜测。can和need与have done连用,一般不能用于肯定句中表推测;would与have done连用,表示虚拟语气。
答案:B
2.It will be a big help if you go to the store and get what we need for dinner. ,I’ll set the table.
A.As a result
B.On the whole
C.In the meanwhile
D.As a matter of fact
解析:句意:如果你去商店买一些我们晚饭所需的东西可真是帮了大忙了,同时我也会摆桌子(准备开饭)。as a result“结果”;on the whole“总的来说”;in the meanwhile“同时”;as a matter of fact“实际上”。根据句意可知C项正确。
答案:C
3.There’s no way of knowing why one man makes an important discovery another man,also intelligent,fails.
A.since B.if
C.as D.while
解析:句意:很难理解为什么一个人会做出一项重要的发现而另一个同样很聪明的人却没有。since “自从,既然”;if “如果”;as “就像……”;while 并列连词,表示“然而”。
答案:D
