is known to all is that the Diaoyu Islands have belonged to China since ancient times.A. A

发布时间：2020-08-17 02:05:42

     is known to all is that the Diaoyu Islands have belonged to China since ancient times.
A. As
B. It
C. What
D. That

网友回答

A. As
B. It
(答案→)C. What
D. That
解析：句意：我们都知道钓鱼岛自从古代就属于中国。That在主语从句中不做成分，只起连接是作用；这里缺少主语从句的连词，并且连词在句中做主语，根据句意故选C。
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