By the time he got up, I ______ for two hours in the factory.
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A
have worked
B
worked
C
was working
D
had been working
推荐题目
________ repeatedly, the problem still appeared in the beginners’ homework.
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A
Explaining
B
Having explained
C
Having been explained
D
To be explained
At the moment of the car accident, Jason’s life _____ in the blink of an eye.
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A
changes
B
had changed
C
was changing
D
changed