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29．Li Ming failed in the exam again he tried really hard． A．if B．so C．though D．since 【查看更多】

 

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Li Ming failed in the exam again _________ he tried really hard．

A．if                 B．so                C．though            D．since

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Li Ming failed in the exam again ________ he tried really hard．

[　　]

A．if

B．so

C．though

D．since

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