-- I have got a headache. -- No wonder. You_________ on the math exercises too long.
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A
work
B
are working
C
have been working
D
worked
推荐题目
Mary has __________ herself __________ for the party.
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A
held; up
B
attended; to
C
done; up
D
turned; up
Because of the bad weather, my mother ____ and lay in bed. She ______ for a week.
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A
has been ill; was ill
B
fell ill; has fallen ill
C
fell ill; has been ill
D
fell ill; is ill
— Alvin，are you coming with us?—I'd love to，but something unexpected ________.
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A
has come up
B
was coming up
C
had come up
D
would come up
The famous reporter, who is said to go back to America next month, _____in China for almost twenty years.
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A
lived
B
was living
C
has lived
D
had lived