单项选择题

—How can I clean my coat
—You ought to have your coat（）

A. clean and press
B. cleaned and pressed
C. cleaning and pressing
D. cleaning and pressed

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—Is Prof. Tate very sick —I'm afraid（）

A. so
B. this
C. that
D. to
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The water at the bathing beach became（）by refuse from the factory.

A. pollute
B. polluted
C. polluting
D. being polluted
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