单项选择题

New ways have been found to prevent the river ().

A. not to be polluted
B. against polluting
C. from polluting
D. from being polluted

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单项选择题
He drove to the airport to () Mr. Dixon who came to see him from Orillia.

A. pick up
B. set out
C. call for
D. tone down
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As fuel prices rose, bus companies raised their fares and().

A. so did the airlines
B. nor did the airlines
C. so the airlines did
D. nor the airlines did
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