问题

______ the working efficiency,the boss allows the employees to have a coffee break. [ ]

A: Improving
B: To improve
C:Having improved
D:Improved

正确答案是：

同类题型

You may depend on ______ that I shall always help you .[ ]

is a saying that ______, “Teach a man to fish, and you feed him for the rest of his life.”

_____that they haven’t known the news.

She searched all the places where she ______ have left her necklace but it was all in vain.[ ]

Watching TV is bad your health.