The room is so dirty. ______ we clean it?

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A cook will be immediately fired if he is found_______ in the kitchen.

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I will go to see you when you _______ the training course.

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________ being absent, nothing can be done.

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_______ much advice I gave him, he did exactly what he wanted to do.

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E-mail, as well as telephones, ___________ an important part in daily communication.

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_______ this text can be used for listening hasn't been decided yet.

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Will it be convenient ______ you ______ start work tomorrow?

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I guess the train ________ by tomorrow noon.

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He ________ for six years by the time he takes his examination.

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