I am ashamed, sir, that I wasted the many hours __________ I should have studie

题型：不详难度：来源：

I am ashamed, sir, that I wasted the many hours __________ I should have studied in class.

A．while

B．before

C．which

D．when

答案

解析

略

举一反三

you feel so terrible now, you may as well see the doctor quickly.

A．As long as

B．For

C．Now that

D．So that

题型：不详难度：| 查看答案

We were on the point of discussing financial investment_____ the telephone rang unexpectedly.

A．while

B．when

C．as

D．once

题型：不详难度：| 查看答案

His timely warning was_____ help us avoid being cheated.

A．so as to

B．such as to

C．so that

D．such that

题型：不详难度：| 查看答案

It is not until recently ______ the scientists have found proof of there being water on Mars.

A．when

B．that

C．how

D．what

题型：不详难度：| 查看答案

He warmly congratulated them on _____ they had achieved in science and technology.

A．that

B．where

C．what

D．which

题型：不详难度：| 查看答案