Once environmental damage ______, it takes many years for the system to recover.

游客2023-10-04 45

问题 Once environmental damage ______, it takes many years for the system to recover.

选项 A、is done
B、will be done
C、has done
D、is to be done

答案 A

解析

转载请注明原文地址:http://tihaiku.com/zcyy/3070196.html

相关试题推荐

随机试题

最新回复(0)

Theoldmantoldusthatmostofthebuildingsthere(damage)______intheearth