—Where ____ Margaret have put the empty bottles?—She ______ them away. They must be somewhere.
#89520
A
can; can’t have thrown
B
must; needn’t
C
must; must have thrown
D
can; must throw
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Messages ______ be changed from sound into electricity before they ______ be sent by radio.
#90077
A
must; will
B
have to; can
C
can; must
D
need; may
He said he would come to attend the lecture if he ___________ time.
#87404
A
has
B
has had
C
will have
D
had
I to my cousin’s birthday party last night, but I was not available
#86870
A
went
B
had gone
C
would go
D
would have gone
“Do you think he is lazy?” “I _________ so once, but I don’t now.”
#89120
A
may have thought
B
can have thought
C
may think
D
might think