Dr. Ma used to            two or three persons in the hospital.
#49403
A
operate on
B
operating on
C
operate for
D
operating for
推荐题目
They preferred ________ to school ________ a bus.
#49971
A
to walk, take
B
walking, to taking
C
to walk, take
D
walk, to take
We are waiting for     .
#48912
A
she comes
B
her to come
C
her come
D
he coming
 Most Chinese students hope ________ homework. If so, they can have much ______time for their hobbies.
#49076
A
to have an hour of; more
B
to have an hour for; most
C
having an hour of; more
D
to have an hour to do; most