问题
选择题
________time went on, the people in the area came to realize how seriously the environment had
been polluted.[ ]
A. As
B. With
C. When
D. While
答案
答案：A
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________time went on, the people in the area came to realize how seriously the environment had
been polluted.[ ]
A. As
B. With
C. When
D. While
答案：A