－Why didn’t Susan come to see us yesterday as she promised?－______.
#87312
A
She must be busy
B
She might have been free
C
She must have been busy
D
She can’t be free
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If we a table earlier, we couldn’t be standing here in a queue.
#86871
A
have booked
B
booked
C
book
D
had booked
If the south had won the war, what is now the United States _____ divided into several countries.
#89150
A
will be
B
might have been
C
should be
D
must have been
________ stop advertising, prices would be greatly reduced.
#89209
A
Were they to
B
Could they
C
If they
D
Would they
The biggest problem for most plants, which ______ just get up and run away when threatened, is that animals like to eat them.
#90173
A
shan’t
B
can’t
C
needn’t
D
mustn’t