单项选择题

Part of the lake has been polluted. You can see the water is covered with ______ oil.

A. a coat of
B. a story of
C. a film of
D. a pad of
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单项选择题
Applications have poured in ______ assignments to remote regions of the country.
A. requiring
B. begging
C. requesting
D. awaiting
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We had to learn to work with others and many of our own ideas had to be ______ for the good of the whole.
A. thrown away
B. compensated
C. brushed aside
D. neglected
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