After Jack had sent some e-mails, he _______ working on his project.
#102159
A
had started
B
has started
C
started
D
starts
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30．When you finish your work, don’t forget to put the tools back where they ________．
#103889
A
are
B
will be
C
were
D
had been
—Welcome to my home! But why didn’t you pay a visit to me last time?— I would have, but I _____ your address.
#100218
A
have forgotten
B
would have lost
C
forgot
D
had lost
--Hi, Mary!-- Oh, it's you. Jack! I ______ you. You look like a star with the glasses.
#100417
A
didn't recognize
B
don't recognize
C
haven't recognized
D
hadn't recognized
Now I get the telegram I _______.
#100048
A
have been expected to
B
expected
C
have been expecting
D
am expected to
Overuse of computers largely to the failure of his eyesight，which is also a warning message for us all．
#101174
A
contributes
B
turns
C
devotes
D
adjusted