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Scientists Ahave long Bstruggle with how to measure the Ceffects of climate chan
Scientists Ahave long Bstruggle with how to measure the Ceffects of climate chan
游客
2025-02-28
21
管理
问题
Scientists A
have
long B
struggle with
how to measure the C
effects
of climate change D
on 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。
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