was once regarded as impossible has come true.A. WhoB. WhichC. ThatD. What

发布时间：2020-08-17 12:35:10

     was once regarded as impossible has e true.
A. Who
B. Which
C. That
D. What

网友回答

A. Who
B. Which
C. That
(答案→)D. What
解析：that是连词，只起连接从句作用，不做句子成分；what是关系代词，相当于something that或anything that，that中不含 what ,但what中有that。
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