Many of them turned a deaf ear to his advice they knew it to be valuable.A. as if B. eve

问题补充：

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

A. as if

B. even though

C. now that

D. so that

答案：

A. as if

(答案→)B. even though

C. now that

D. so that

解析：考察连词。As if 似乎，好像 Even though尽管 now that 既然 so that 为了，以致于

句意为，他们中的很多人对他的建议充耳不闻，尽管他们知道他的建议很有价值。