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科目： 來源：不詳 題型：單選題

It won’t be quite a long time ________ your son is back, so don’t be worried.
A．that B．since C．before D．until

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科目： 來源：不詳 題型：單選題

The earth became so violent that it was not clear_________ the shape would last or not.
A．ifB．howC．whetherD．why

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科目： 來源：不詳 題型：單選題

The head of the company promised to deal with matters of this sort _____he returned to his office．
A．until B．while C．by the time D．the moment

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科目： 來源：不詳 題型：單選題

Yang Liwei was surrounded by the audience _____ he stepped off the stage.
A．untilB．throughC．now thatD．instantly

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科目： 來源：不詳 題型：單選題

Double ovens are a good idea, especially ________ you are cooking several meals at a time.
A．thoughB．ifC．thatD．unless

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科目： 來源：不詳 題型：單選題

____ I understood very little French, I couldn’t follow their conversation.
A．AlthoughB．UnlessC．SinceD．Before

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科目： 來源：不詳 題型：單選題

____ he grows up can he understand your intentions.
A．UnlessB．OnceC．Only whenD．Ever since

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科目： 來源：不詳 題型：單選題

_____ she is the only daughter of the boss, she started from the lowest position as a common employee.
A．UnlessB． While C． SinceD．As

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科目： 來源：不詳 題型：單選題

Just call me whenever you are in trouble ______ I’ll come to help you immediately.
A. but           B so                    C. or               D. and

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科目： 來源：不詳 題型：單選題

---How long is it _____ we last met?
--- About five years. You haven’t changed much.
A．beforeB．sinceC．whenD．that

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