问题
选择题
The humans are destroying nature day by day,__________of course,will cause severe punishment from it sooner or later.
A．who
B．when
C．on which
D．Which
答案
答案：D
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The humans are destroying nature day by day,__________of course,will cause severe punishment from it sooner or later.
A．who
B．when
C．on which
D．Which
答案：D