Therearesomanyfoggydaysrecently,weallwonder
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问题详情:
There are so many foggy days recently, we all wonder_________.
A. how is the air polluted
B. why the air is seriously polluted
C. what can we do to prevent that bad weather
D. what are the real reasons
【回答】
B
知识点:宾语从句
题型:选择题
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