．--- Hurry up. The bus is coming.
--- Oh, no. We mustn’t cross the street_______the traffic lights are green.
| A．until | B．since | C．while | D．after |
--- It’s wrong for a student to follow ____ his teachers say.
--- It’s true. I can’t agree ____.
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The sports meet , originally due to be held last Friday, was finally _____ because of the bad weather.
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--- You are going to publish my book .Are you serious?
--- _______. It’s to be published next month.
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--- Were they late for the play?
--- Not really. As soon as they ____ themselves in their seats in the theater, the curtain ____.
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--- It’s a long time ____ I saw you last.
--- Yes, and what a pity. It will be a long time ____ we see each other again.
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