By the time he was twelve, Edison _______ to make a living by himself.
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A
would begin
B
has begun
C
had begun
D
began
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Investment by Chinese companies in the US _____ rapidly in recent years.
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A
was growing
B
has been growing
C
had grown
D
will be growing
As we all know, the world’s supplies of oil_________ up with the development of industry and the increase of cars.
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A
are being used
B
are using
C
have used
D
have been used
一Peter, have you got your new flat furnished?一Yes．I some used furniture and it was a real bargain．
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A
will buy
B
have bought
C
bought
D
had bought
If the weather had been better, we could have had a picnic. But it ____ all day.
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A
rained
B
rains
C
has rained
D
is raining
(2013·高考北京卷)Hurry up！Mark and Carol________us.
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A
expect
B
are expecting
C
have expected
D
will expect