.Many of them turned a deaf ear to his advice, __________ they knew it to be valuable.

A. as if    B. now that

C. even though      D. so that

C。


解析:

as if意為“好像”“似乎”，now that意為“既然”，even though意為“盡管”“雖然”，so that意為“為了”。比較四個選項，只有選C最合適。

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