It was playing computer games that cost the boy plenty of time he ____ doing his lessons.
#89110
A
might have spent
B
ought to have spent
C
must have spent
D
could have spent
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If it __________for the snow, we ___________the mountain yesterday.
#86962
A
were not; could have climbed
B
were not; could climb
C
had not been; could have climbed
D
had not been; could climb
 —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