“Look at these tracks. It _______ be a wolf.” “Don’t be so sure. I think it _______ be a fox.”
#89541
A
must; could
B
may; might
C
need; must
D
could; need
推荐题目
It’s required that the students______ mobile phones in their school, so seldom ______ them using one.
#86714
A
not use; will you see
B
should not use; you will see
C
don’t use; will you see
D
would not use; you will see
--Did Jane come to help you yesterday?--Yes, but I would rather _________. She caused me a lot of trouble.
#86753
A
not have
B
not
C
she didn’t
D
she hadn’t
The workers demanded that their employer_____ their working conditions.
#86737
A
had improved
B
would improve
C
improve
D
will improve
—I didn’t attend the lecture yesterday.—I ______, either, if my mother hadn’t reminded me.
#88095
A
wouldn’t
B
wouldn’t have
C
didn’t
D
hadn’t
“Isn’t it about time you _____ to do morning exercises？” “Yes, it is. Would you like to join us？”
#90574
A
begin
B
have begun
C
began
D
had begun