______ you are free tonight,let's go to the bar together,shall we?A)Because B)As C)Since D)For

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______ you are free tonight,let's go to the bar together,shall we?A)Because B)As C)Since D)For
______ you are free tonight,let's go to the bar together,shall we?A)Because B)As C)Since D)For

______ you are free tonight,let's go to the bar together,shall we?A)Because B)As C)Since D)For
答案选B)As
如果你今晚有空,让我们一起去酒吧,怎么样?

since,既然,因为已经说let's go了,说明是已知原因的。

选C,since用于句首引导原因状语从句,语气较弱,含有“既然”的意思