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The factory ______ its waste into the river, but now it deals with the waste in a new way.
#77406
A
used to dump
B
is used to dump
C
used to dumping
D
is used to dumping
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 “Not having returned home yet, _________”, his father said to the police.
#63543
A
his mother got worried
B
his mother must be worried
C
I think he is missing
D
he must have got into some trouble.
No one _____ be more generous; he has a heart of gold.
#62945
A
could
B
must
C
dare
D
need
We can see light in his office. He___________ be in his office.
#63444
A
can
B
can't
C
must
D
might
When the traffic lights are red, we _______ stop.
#77230
A
should
B
might
C
must
D
may
 Jack _______ swim when he was five years old.
#78233
A
can
B
could
C
may
D
must