单项选择题

It’s high time () about the traffic problems.

A. something was done
B. something is done
C. anything will be done
D. nothing to be done

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单项选择题
Private cars have made the traffic problems ()

A. the worse than before
B. worse than ever before
C. more bad as before
D. more bad than it was
单项选择题
()you decide to take up, you should try to make it a success.

A. If only
B. Unless
C. Wherever
D. Whatever
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