it is high time that we ( ) to think how to deal with the problem of air pollution.
题目
it is high time that we ( ) to think how to deal with the problem of air pollution.
A.began B.would begin C.begin.D.should begin.如何选,为什么?
答案
A,固定结构,It's time sb did sth.
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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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