问题

Clearly there is much to be desired _____ it comes to the quality of teachers and their teaching methods.

A:when
B:since
C:until
D:although;

正确答案是：

同类题型

The map is one of the best tools a man has ________ he goes to a new place. [ ]

How was your trip -_______. I hope I can go there again.

Is there anything ________ I can do for you?

Every student is _____ to obey the school rules.

Listen! Someone is knocking atthe door. Who _____it be?—It_____be Tom. He phoned tovisit me this evening.