—Why didn't you answer my phone when I phoned you at about 11 p. m. yesterday? —I ___________and failed to hear the phone.
#89324
A
might have slept
B
must be sleeping
C
might be sleeping
D
must have been sleeping
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The professor ________at 8 o’clock,but he has not shown up yet,which worries all of us.
#86762
A
was supposed to arrive
B
must have arrived
C
might have arrived
D
was supposed arriving
 It was the order that all the soldiers ________to the front.
#87014
A
should send
B
must be sent
C
be sent
D
must go