879.All the training you have been doing seem to have _____ handsomely.

A.put off

B.called off

C.paid off

D.broken off

880.Lucy was completely ____ after jogging in the hot sun all afternoon； she had little energy left.

A.kicked out

B.worn out

C.handed out

D.put out

 879.答案是C;

put off 推迟，延期；call off放弃，取消；pay off还清债务，得到好结果;break off折断，停止，绝交。

880.答案是B;

kick out 踢出界;wear out 疲乏，穿破;hand out 分派，交出;put out 扑灭。