Mr Wang is one of the teachers in our school to the U.S .twice.
题目
Mr Wang is one of the teachers in our school to the U.S .twice.
A who has been B that has been C which has been D who have been
答案
D
who指代the teachers in our school,所以要用who have been.
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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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