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_________ he knew nothing about her.

[  ]

A.He appears as if
B.It seems that
C.It appears as if
D.It seems as if

答案:D
解析:

it seems后既可接that从句,也可接as if从句,但that从句必须用陈述语气;as if从句可用陈述语气或虚拟语气。用虚拟语气时,从句用过去式表示与seem同时发生的情况,用过去完成时表示先于seem发生的情况。本题从句动词为knew,表示虚拟,故用as if连接。seemappear的主语若是sb.时,其后只能是不定式,另外appear不与as if连用,故排除AC两项。


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