---How did you work out the difficult chemistry problem?--- I worked it out by ________.
#49667
A
working with a group
B
think very hard
C
ask the teacher for help
D
doing oneself
推荐题目
----Where is Tom now, Millie?----I saw him _______ in the street a moment ago and I told him _________.
#48934
A
playing; don’t do so
B
playing; not to do so
C
play; to do so
D
play; don’t do so
What difficulty I had _____ the dirty walls! I had no choice but to have it ____ again.
#48673
A
clean, paint
B
cleaning, painting
C
cleaned, to paint
D
cleaning, painted
Dr. Ma used to            two or three persons in the hospital.
#49403
A
operate on
B
operating on
C
operate for
D
operating for