This is an illness that can result in total blindness if ( )

This is an illness that can result in total blindness if ( ) untreated in time.
A.being left B.left C.to be left D.leaving

yhx8atom 1年前已收到2个回答举报

蒲公英的爱情幼苗

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B left 表被动
if从句后省略了主语和be动词
即这句话完整为：This is an illness that can result in total blindness if (it is left ) untreated in time.
这个疾病如果不被及时治疗将会导致完全失明.

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龙翔无忌幼苗

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