---Look at these tracks. It _____ be a wolf.” ---Don’t be so sure. I think it _____ be a fox.
#87712
A
must; could
B
may; might
C
need; must
D
could; need
推荐题目
I’d rather that you ______ the operation right away.
#88337
A
perform
B
should perform
C
will perform
D
performed
I ________ through that bitter period without your generous help.
#87448
A
couldn’t have gone
B
didn’t go
C
would go
D
hadn’t gone
—What does the sign over there read?—“No person___smoke or carry a lighted cigarette,cigar or pipe in this area.”
#89077
A
will
B
may
C
shall
D
must
