The robot needs _______ once a month. And we will check it for you for free.
#48844
A
to check
B
checked
C
checking
D
to checking
推荐题目
At last the boy was made_____ and began to laugh.
#50101
A
stop crying
B
to stop to cry
C
to stop crying
D
stop to cry.
Jack is often seen _______ basketball with his friends after school.
#50900
A
play
B
to play
C
to playing
D
played
—You forgot______ off the lights? It’s still on.—But I remember _______them off before I went out of the room.
#49390
A
turning; to turn
B
to turn; turning
C
turning ; turning
D
to turn; to turn
We had great fun ________the volleyball match between the Chinese team and Japanese team.
#48971
A
watch
B
watched
C
watches
D
watching