单项选择题

Machines that use hydraulic pressure including elevators, dentist chairs, and automobile brakes.()

A. exclude
B. excluding
C. include
D. are included

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单项选择题
There is no alternative, the president must approve the bill if Congress passes it（）.

A. chance of agreement
B. doubt
C. other choice
D. mistake
单项选择题
I can still vividly remember to pick our steps in the mountain down the deep valley on my 21 st birthday.()

A. picking.., in the mountains
B. picking ... on the mountain
C. having picked ... from the mountains
D. picking ... from the mountains
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