Now there are already robots _________ in factories.
#50464
A
working
B
to work
C
work
D
worked
推荐题目
Mr Smith told me that he wasn’t used to ___ by plane and he usedto __sick a lot.
#50880
A
travelling; feel
B
travel; feeling
C
travel; feel
D
travelling; feeling
I often see my mother ____________ chess with my father after supper.
#51021
A
to play
B
played
C
playing
D
play
Jack had a wonderful time _____ many interesting places in Beijing and he had much time __________ the city.
#50019
A
to visit; to enjoy
B
to visit; enjoying
C
visiting; to enjoy
D
visiting; enjoying
