Mr. Smith went to a bookstore, where a lot of books were        .
#4588
A
produced
B
invented
C
housed
D
disappeared
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She _______ in Zhuzhou for ten years.
#4547
A
will work
B
work
C
was working
D
has worked
But for their help, we ____ the program in time.
#4795
A
can not finish
B
will not finish
C
had not finished
D
could not have finished