__ was once regarded as impossible has come true.A．WhoB．WhichC．ThatD．What
题型：不详难度：来源：
| __ was once regarded as impossible has come true. |
答案
| D |
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。 |
举一反三
Is this the factory ___ you visited last year?| A．the one | B．where | C．that | D．which |
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___ he will come is certain.| A．What | B．That | C．Whether | D．If |
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I found ____ strange ____ she had not come yet.
A.it….that B that…that C.this…./ D.it…./ |
.She said ___ she ate little and ___ she was not hungry.| A．that…/ | B．/…./ | C．/…that | D．it….that. |
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The problem lies ___ she knows little English.| A．that | B．in the fact | C．in fact that | D．in the fact that |
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