—I’m going to the United States. —How long ______ you ______ in the United States?
#102495
A
are; stayed
B
are; staying
C
have; stayed
D
did; stay
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After Jack had sent some e-mails, he _______ working on his project.
#102159
A
had started
B
has started
C
started
D
starts
With the rapid development of medical science, we ________ more new drugs used in the treatment of cancer.
#101807
A
see
B
had seen
C
will be seeing
D
would see
More than a dozen students in that school ________ abroad for further study every year.
#99399
A
sent
B
are sent
C
have been sent
D
have sent
When I ______home, I caught a thief stealing from a passer-by.
#99768
A
headed
B
was heading
C
has headed
D
had headed
I suggest you delete the useless files on the computer which _______ too much space.
#99334
A
give away
B
make up
C
set aside
D
take up