题目内容
They ____ on the program for almost one week before I joined them, and now we ____ on it as no good results have come out so far.
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When the old man _____ towalk back to his house, the sun ____ itself behind the mountain.
Scientiststhink that the continents ____ always where they ____ today.?xml:namespace>
–If the traffic hadn’t been so heavy, I could havebeen back by 6 o’clock.?xml:namespace>--What a pity! Tina ____here to see you.
The country life he was used to ____ greatlysince 1992.
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