—This wall of air is an effective answer to the problem and it ____ work. —But it is a question to put such a wall of air around the statue.
#89204
A
may
B
must
C
should
D
could
推荐题目
—I didn't go to see the doctor yesterday. —But you________.
#89498
A
ought
B
ought to
C
oughted to
D
ought to have
. --- Did you often e-mail your family during the first year at university? --- No. I was so busy meeting new people that I didn’t write to my family as I _____.
#88090
A
ought to
B
should do
C
should have written
D
should have
“I thought you wouldn’t mind.” “Well, as a matter of fact I don’t, but you _____ me first.”
#89567
A
should ask
B
should have asked
C
must ask
D
must have asked
—Guess what？ I have got A for my term paper.—Great!You _______ read widely and put a lot of work into it.
#87247
A
must have
B
should
C
must
D
should have