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45.You may choose one from _________ was left.

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45.You may choose one from _________ was left.
A.that B.all C.those which D.what
此题答案选D
能告诉一下那句子的结构吗?
45.You may choose one from _________ was left.
You may choose one from _________(介词后应填入名词性结构)
A that was left,(这只可能是定语从句,不能作介词宾语)
B all (用不定代词all的话,必须补上定语从句关系词that,all that was left)
C those which was (代词 those 可作宾语,又能构成定语从句,但是从句中 was 不能与those呼应,要改成 were)
D what (what是宾语从句连接词,与后面构成宾语从句 what was left --"剩下的东西",what宾语从句表示"...的东西"时,可以视作单数,因此可以使用was)
因此,只能选择what构成宾语从句作介词宾语
句意为:你可以从剩下的东西中选一个
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另外要提醒一下的是,all that = what
不能够说 all what