(2013·四川高考)—Why are your eyes so red? You ________ have slept well last night.—Yeah, I stayed up late writing a report.
#86578
A
can't
B
mustn't
C
needn't
D
won't
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—Perhaps John's not in.—______.Look,the light's on.
#89430
A
Yes,he can be at home
B
No,he couldn't go out
C
Yes,he must be at home
D
No,he needn't go out
____ the expense, I ____ a round-the-world tour. 
#89984
A
Were it not … would take
B
If it were not… take
C
Weren't it for… will take
D
If it hadn't been for… would have taken
 He ______ the test again, in which case, his mother will be very disappointed. 
#89549
A
might fail
B
must have failed
C
should fail
D
could have failed