If I_____plan to do anything I wanted to ,I’d like to go to Tibet and travel through as much of it as possible 
#89619
A
would
B
could
C
had to
D
ought to
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—Why didn’t Susan come to school? —I don’t know. She____ ill.
#87988
A
could be
B
may have been
C
might
D
must have been
We would have called a taxi yesterday if Harold __________us a ride home.
#87413
A
didn’t offer
B
wouldn’t offer
C
hasn’t offered
D
hadn’t offered
As a graducate in computer science, he ___ to work out the problem.
#89044
A
wouldn't have failed
B
can't have failed
C
mustn’t have failed
D
might not have failed