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.

admin2021-04-13  30
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 cast pearls before swine是固定搭配，表示“明珠暗投；对牛弹琴”，故选B项。
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