Grandpa is growing old. He keeps on       the same thing over and over again.
#48625
A
tell
B
tells
C
told
D
telling
推荐题目
If people keep _______ down the forests, they will have nowhere _______.
#50334
A
to cut, to live
B
cutting, to live in
C
to cut, to live in
D
cutting, to live
Would you mind ____ here
#49904
A
smoke
B
smoking
C
not smoking
D
smokes