问题
Most scientists seem to agree that _______certain limit should be set on _______consumption of cars to ease air pollution．
A:a; the
B:/;the
C:the; /
D:the; the
B:/;the
C:the; /
D:the; the
正确答案是：
同类题型
It is the most instructive lecture that I ________ since I came to this school.
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do morespeaking _____, even when we have a break after class.
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