12.Read the text a second time and you will probably know what the principle ______ a hovercraft wor
题目
12.Read the text a second time and you will probably know what the principle ______ a hovercraft works.
A.is on that
B.has on which
C.is on which
D.on which
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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