They use computers to keep the traffic _______ smoothly. 
#5026
A
being run
B
run
C
to run
D
running
推荐题目
He _____ live in a remote village, but he ______ the life in the city quickly. 
#4667
A
got used to; used to
B
used to; got used to
C
got used to; was used to
D
used to; used to
—I’ll go camping this weekend.—          .     
#4519
A
Best wishes
B
No,I'm too busy
C
Don’t give up now
D
Have a good time