Scientists Ahave long Bstruggle with how to measure the Ceffects of climate chan

游客2024-01-14 56

问题 Scientists Ahave long Bstruggle with how to measure the Ceffects of climate change Don wildlife.

选项 A、
B、
C、
D、

答案 B

解析本题考查现在完成时。现在完成时的构成为have+done。故选择B，应改成struggled with。

转载请注明原文地址:http://tihaiku.com/zcyy/3361979.html

相关试题推荐

随机试题

最新回复(0)

Scientistshavetoworkhardtokeep______withmoderndiscoveriesanddevelopm