2. 外语
  3. It will be casting pearls before______because he does not know how to appreciate favors.

It will be casting pearls before______because he does not know how to appreciate favors.

admin2016-10-07  34
问题 It will be casting pearls before______because he does not know how to appreciate favors.
选项 A、cow
B、swine
C、dog
D、sheep
答案B
解析 固定搭配题。cast pearls before swine是固定搭配，表示“对牛弹琴”，故选[B]。
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