Question

Oh, Mary, I’ll have to ________ now. Someone wants to use the phone. Good-bye.

1. A.
   ring up
2. B.
   ring off
3. C.
   call back
4. D.
   call off

Answer 1

B
此句取自一个电话的谈话：因为有别人要打电话，说话者只好挂筒。其中的短语动词ring off作“挂断电话”解call off推迟。