(2009辽宁大连调研I ______ have been more than six years old when the accident happened. 
#90247
A
shouldn’t
B
couldn’t
C
mustn’t
D
needn’t
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Mary is ill today. If she _____, she ____ here at school
#86351
A
were not ill;would be
B
had been ill;wouldn't have been
C
were ill;should have been
D
hadn't been ill;could be
Why didn't you tell me there was no meeting today? I______ all the way here through the heavy snow. 
#89455
A
needn't have driven
B
can't have driven
C
mustn't have driven
D
shouldn't have driven
_______Wale_______at school,he would gain much higher a salary.
#88924
A
Had;worked
B
If;worked
C
Did;work
D
If;has worked