31_______
A.Though
B.For
C.Therefor
D.But
正确答案：D此处与前一句是转折关系，故用转折连词but，选D。
31_______
A.Though
B.For
C.Therefor
D.But
正确答案：D上一篇 If you want to have someone wake you up in the morning, you may call.A.800－5224B.800－5
下一篇 So far we have done a lot to build a low－carbon economy, but it is________ ideal. We h
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