“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
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If the dog hadn’t woken us, we wouldn’t have noticed the fire and it _____ to the house next door.
#86352
A
could spread
B
should have spread
C
would spread
D
might have spread
.—Would you mind if I opened the window? — ____. In fact , I was going to suggest you _____it.
#87228
A
Yes; not did
B
Not at all; do
C
More or less; did
D
Of course; do
 The manager demanded that the task ______ within a week.
#87298
A
must complete
B
would be completed
C
be completed
D
must be completed