They worked ________ day and ________ night and were paid by ________ hour.

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　　Does he work hard at his lessons?

　　Yes, he ________ no efforts, I dare say.

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No matter how serious you pretend to be, he won't listen to you ________ .

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It was the workers' ignorance of the regulations_______ the absence of regulations that led to the accident.

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Dick is a clever boy, but, ________ ,he makes many mistakes in spelling.

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—Long, long ago, businessmen travelled on foot.

—________ , I suppose.

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—You were tired after the sports meet, weren't you?

—Yes, ________ . I could hardly stand.

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There are twenty people in the medical team , ________ .

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________ a certain doubt among the students as to the necessity of the work.

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In western countries, people are afraid of ________ .

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