— I phoned you yesterday morning. A girl answered, but I didn’t recognize the voice.— Oh, it __________ my younger sister. She was in my room at that moment.
#62876
A
must have been
B
should have been
C
could have been
D
may have been
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Don’t use water to put out the fire if oil catches fire. As is known, oil ____ float on water.
#63170
A
shall
B
must
C
may
D
will
I ______have come here in time, but I met an old friend of mine. I stopped and talked with him for some time.
#62761
A
shouldn’t
B
must
C
needn’t
D
could