单项选择题

Two TV cameras ______ eyes of a mechanical man.

A. are served as
B. serve as
C. will be serve as
D. were serve as
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单项选择题
The writer was always looking for suitable ______ to use in his next story.
A. contents
B. articles
C. pages
D. ideas
单项选择题
You ______ all those clothes! We have a washing machine to do that sort of thing.
A. needn't have washed
B. shouldn't have washed
C. must not have washed
D. can not have washed
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