I was in the middle of my call because I had no more coins to put in the box.A. cut offB.

问题补充：

I was in the middle of my call because I had no more coins to put in the box.

A. cut off

B. broken in

C. hung up

D. put down

答案：

(答案→)A. cut off

B. broken in

C. hung up

D. put down

解析：短语辨析。 A.切断；中断 B.打断；闯入 C.挂断；套牢 D.记下；制止。句意：因为我没有更多的硬币投入箱子里，我在通话中被中断了。选A。