Madonna ____a straight A student,but it was dancing that she was really crazy about.   
#89032
A
must be
B
could be
C
must have been
D
could have been
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We were delayed at the airport.Otherwise,we    here by lunch.
#86444
A
must have been
B
could be
C
should be
D
would have been
If Sanlu Group     melamine to the milk,the babies     too much from kidney stone.
#87595
A
didn’t add; would not suffered
B
hadn’t added; wouldn’t have suffered
C
hasn’t added; wouldn’t have suffered
D
hadn’t added; would have suffered
His homework______, but it _____.
#90163
A
needs correcting; needn’t rewriting
B
need be corrected; doesn’t need to be rewriting
C
needs correcting; needn’t be rewritten
D
needs to be corrected; needn’t to be rewritten