Question

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

A．tell

B．tells

C．told

D．telling

Answer 1

D

試題分析：句意：爺爺在變老，他一遍又一遍地重復講同一件事。keep on doing sth.持續做某事，后跟動名詞，故選D。