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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

Students ___________ remain in their seats until all the papers have been collected.

On my way home。I saw analieninto a shop.I stoppedphotosexcitedly.—Sounds exciting!

What kind of car do you want to have? A large 0ne? —Well,it_______ be large.——that’S not important.

.Mr.Smith warned her daughter ______ after drinking.

Friends are those ___make you smile, always open their hearts to you and encourage you to succeed.

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