A recent announcement by scientists ____ they have successfully cloned the first human embryo has ca
题目
A recent announcement by scientists ____ they have successfully cloned the first human embryo has caused much debat.
A.in which B.that
因为是同位语从句,那为什么不能看成是定语从句呢,in the announcement不是也可以吗
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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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