单项选择题

______ often I try, I cannot find the answer.

[A] Although
[B] Whatever
[C] As
[D] However

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单项选择题

E-mail is a convenient, highly democratic informal medium for conveying messages that ______ well to human needs.

[A] adheres
[B] reflects
[C] conforms
[D] satisfies

单项选择题

The police are trying to find out the ______ of the woman killed in the traffic accident.

[A] evidence
[B] recognition
[C] status
[D] identity

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