The book I bought from the bookstore isn’t here. Who __________?
#89207
A
could have taken it
B
must have taken it
C
might take it
D
should take it.
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There used to be a small school,___________?
#90055
A
was there
B
wasn’t it
C
usedn’t there
D
usedn’t it
There was a traffic jam; otherwise I ____ here on time.
#87428
A
would be
B
had been 
C
should be
D
would have been