Last night Bruce was observed________the building with two young men and take a taxi away.
#99129
A
leave 
B
left
C
having left 
D
to leave
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By the time Jack returned home from England, his son_____ from college.
#102076
A
graduated
B
has graduated
C
had been
D
had graduated
He began to __________ because every means _______ tried already.
#104224
A
lose heart; has been
B
lose heart; had been
C
lose his heart; was
D
lose his heart; had
(2014·日照模拟)It’s really a small world!I________we would meet here.
#99131
A
don’t think 
B
haven’t thought
C
didn’t think 
D
won’t think