题目

The boy said ______ couldn’t he work out the problem but his teacher didn’t know how to do it.    A. though     B. never    C. hardly     D. not only   答案:D依据倒装语序(couldn’t he work)排除A项;由于使用了couldn’t,就不能再用never或hardly,故选D项。另外not only与后文的but也一致。    命题“两直线平行,内错角相等”的题设是(    ),结论是(    ).
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