The teacher’s efforts ______ when one of his students was admitted to Beijing University last summer.


  1. A.
    paid back
  2. B.
    paid off
  3. C.
    paid for
  4. D.
    paid out
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科目：高中英語(yǔ) 來源： 題型：

.The teache rfound ____ difficult to decide____ he would take with him to attend the

conference.

  A.it;whom        B.himself;who       C.this;whom      D.that;who

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