Tens of thousands of people have visited Expo 2010 Shanghai China ________ it opened in April. [ ]A.

题目简介

Tens of thousands of people have visited Expo 2010 Shanghai China ________ it opened in April. [ ]A.

题目详情

Tens of thousands of people have visited Expo 2010 Shanghai China ________ it opened in April.
[     ]
A. for
B. before
C. since
D. while
题型:单选题难度:中档来源:河北省模拟题

答案

C

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