问题

What do you think of Tom —He has been working very hard ______ heis an advanced worker

A:which
B:what
C:whether
D:who

正确答案是：

同类题型

What were you and your cousin doing at this time yesterday— He was reading a magazine ________ I was writing an e-mail.

"How many elephants did you see""_____".

The little boy is dirty from head to foot because he ________ in the mud all morning

. I think that this film is _______ a film, it is also a good material for education.

We should _____ the power when our TV or computer is not used.