问题
选择题
The worsening of global warming, _____human activities are to blame, has led to frequently extreme weather.
A．by which
B．for which
C．that
D．what
答案
答案：B
blame后面接宾语需要加介词for,故选B.
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The worsening of global warming, _____human activities are to blame, has led to frequently extreme weather.
A．by which
B．for which
C．that
D．what
答案：B
blame后面接宾语需要加介词for,故选B.