[单选题]Hard( )he tried, he was unable to meet the deadline for the term paper.

A

although 

B

as

C

if 

D

since

正确答案:B
题目解析

此句hard在句首,连词在中间,说明是倒装,且是形容词/副词+as+主语+谓语的形式,表转折,选B。句意:尽管他努力尝试,但未能赶上期末论文的最后期限。

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