The key________ the problem of traffic jams is to pay the "congestion charge" ________ by

题目简介

The key________ the problem of traffic jams is to pay the "congestion charge" ________ by

题目详情

The key  ________ the problem of traffic jams is to pay the "congestion charge" ________ by the
mayor of London.
[     ]
A. to solving; introducing
B. to solve; introducing
C. to solving; introduced
D. to solve;  introduced
题型:单选题难度:中档来源:四川省同步题

答案

C

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