--- Guess what! I have got A for my term paper. --- Great! You ______ read widely and put a lot of work into it.
#89099
A
must
B
should
C
must have
D
should have
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The little girl        ,but her family was too poor at that time.
#89335
A
could go to school
B
could have gone to school
C
must have gone to school 
D
can have gone to school
He was busy with his essay at that time. Otherwise he ____ over to help us.
#87011
A
had come
B
would come
C
would have come
D
was coming