单项选择题

The entire process is called the greenhouse effect, and most of it is caused by the prevalent greenhouse gas, water vapor.

A．predominant
B．executive
C．superior
D．remarkable
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单项选择题
The dispute between the faculty and the administration was not resolved until the faculty members got better working conditions.
A．threat
B．disquisition
C．problem
D．argument
单项选择题
Well, you' re a tall man and you can carry a good deal of weight without looking awkward.
A．inconvenient
B．funny
C．untidy
D．clumsy
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