Please stop ____. It's time for class. [

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问题选择题

Please stop ____. It's time for class. [ ]

A. talking

B. talk

C. talked

D. to talk

答案

答案：A

选择题

Take time lo relax by listening to music, reading a book or just spending some time alone.

Relaxing allows you _______ to your students with more energy. [ ]

A. return

B. to return

C. returning

单项选择题

土的天然含水量ω=25%，液限ωL=40%，塑限ωP=15%，其液性指数IL为()。

A.2.5

B.0.6

C.0.4

D.1.66