the boss asked his secretary____he had finished typing the repord____.Aif;or not B if;not...
题目
the boss asked his secretary____he had finished typing the repord____.Aif;or not B if;not...
the boss asked his secretary____he had finished typing the repord____.Aif;or not B if;not C whether;or not D whether;not 最好讲一下理由
答案
选A.这是一个过去时的虚拟语气句子,意思是,老板问了秘书是否已经打完了这份报告.
or not 后面其实精简了内容的表达形式.if,是虚拟语气的使用词
举一反三
已知函数f（x）=x，g（x）=alnx，a∈R．若曲线y=f（x）与曲线y=g（x）相交，且在交点处有相同的切线，求a的值和该切线方程．
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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