Our monitor requested that ________.
#87441
A
all the class studied more carefully the problem
B
the problem was more carefully studied
C
with great care the problem could be studied
D
all the class study the problem more carefully
推荐题目
If people ______virtual reality holidays, we ______ on an around-the-world tour.
#87555
A
invent; go
B
invented; had gone
C
invent; have gone
D
invented; would go
You ___ me, but since you have,I’ll keep it secret from others.
#89047
A
needn’t have told
B
didn't need to tell
C
wouldn't have told
D
couldn't have told
--- How much shall I pay for the phone call? --- You ________. This is free of charge. 
#87096
A
shouldn’t
B
can’t
C
don’t have to
D
mustn’t