问题 选择题

Grandpa is growing old. He keeps on       the same thing over and over again.

A.tell

B.tells

C.told

D.telling

答案

答案:D

题目分析:句意:爷爷在变老,他一遍又一遍地重复讲同一件事。keep on doing sth.持续做某事,后跟动名词,故选D。

单项选择题
单项选择题