They use computers to keep the traffic _____ smoothly.
#98040
A
being run
B
run
C
to run
D
running
推荐题目
The word "breakthrough" is often used when talking about the newest drug or the next treatment ___ in cancer research．
#95686
A
finding
B
being found
C
to be found
D
found
The wallet ________ several days ago was found ________ in the rubbish.
#97618
A
stealing; lie
B
stolen; lying
C
stealing; lain
D
stolen; to lie
_______with his graduation design, he has been working in the library for a week.
#97155
A
Having occupied
B
Occupying
C
Being occupied
D
Occupied