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

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

       A．paid back       B．paid off       C．paid for         D．paid out

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

A. paid back   B. paid off   C. paid for      D. paid out

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