Once environmental damage _______,it takes many years for the system to rec
Once environmental damage _______,it takes many years for the system to rec
a、has done
b、is to do
c、 does
d、is done
a、has done
b、is to do
c、 does
d、is done
英语人气：473 ℃时间：2019-09-05 08:10:05
优质解答
D
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