She kept telling her son not to get online too frequently, but ________ didn't help.

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He is not ________ a teacher. He is not good at teaching.

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According to Bill Gates, the idea ________ we can play video games and receive e－mails without sitting at a key－board will come true.

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Would you like ________ knife and fork, or would you rather use chopsticks, sir?

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Although he tried, he ________ not make it properly.

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_____ the year 2008 draws near, the construction of Olympic sites is catching the attention of the public.

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A．So long as　　　B．As

C．Once　　　　　D．Whether

--I'll tell Mary about her new job tomorrow.

--You _____ her last week.

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A．ought to tell　　　B．would have told

C．must tell　　　　 D．should have told

--I stayed at a hotel while in New York.

--Oh, did you? You _____ with Barbara.

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A．could have stayed　　　B．could stay

C．would stay　　　　　　D．must have stayed

Alice returned from the manager's office, ________ me that the boss wanted to see me at once.

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The building ________ by the end of this year will be the tallest in the city.

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