there are three libraries in our school,all of which were built three years ago.
题目
there are three libraries in our school,all of which were built three years ago.
如果把句子里的 all of which 改成“and all of them
答案
举一反三
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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