问题详情:
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
【回答】
C
知识点:介词
题型:选择题
问题详情:
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
【回答】
C
知识点:介词
题型:选择题