专四
单选题正确答案是（ ）
A． at
B． on
C． for
D． with
参考答案：B进入在线模考
介词辨析题。句意为：对家庭的日益重视也是出生率增长的原因。固定搭配place value on意为“对……重视，看重……”。
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