2. 外语
  3. Tom______better than to ask Dick for help.

Tom______better than to ask Dick for help.

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问题 Tom______better than to ask Dick for help.
选项 A、shall know
B、has known
C、shouldn’t know
D、should have known
答案D
解析 know better than to do sth．=be wise enough not to do sth．意为“懂得不该……；非常精明不至于做(某种蠢事)”。should have known better than to ask Dick forhelp意为“应懂得不该向迪克请求帮助”。
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