By the time Jack returned home from England, his son            from college.
#101871
A
graduated
B
has graduated
C
had been
D
had graduated
推荐题目
She ____ the book for 2 weeks .
#103926
A
has lent
B
has borrowed
C
has bought
D
has kept
Tom as well as two of his friends ______ to the concert last night.
#104342
A
has been invited
B
had been invited
C
were invited
D
was invited