问题

In order to meet the deadline, Professor Smith along with his assistantsthe project day and night.

A:work on
B:works at
C:is working on
D:are working on

正确答案是：

同类题型

The change was so _____ that we hardly noticed it.

Can you make sure ______ the gold ring

_____________ you have done might do harm to other people.

________her sleeping baby in the arms, the scene wasvery happy.

Sina said she ______ to school the next Sunday.