问题
选择题
In a harmonious society,we'd better prevent pollution _______ happily. [ ]
A. to live
B. lived
C. living
D. beinglived
答案
答案：A
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In a harmonious society,we'd better prevent pollution _______ happily. [ ]
A. to live
B. lived
C. living
D. beinglived
答案：A