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Although caffeine is a (A) moderately habit-forming drug, coffee is not (B) regarded as (C) harmfully to the average (D) healthy adult.

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We expected her at nine but she finally______at midnight.

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It is very important for a firm or a company to____changes in the market. 

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You ______out last night. I called several times but nobody answered the phone.

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Having passed the entrance exam, _____go away for a holiday.

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“More coffee? Anybody?” ~  « ______________ »

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Political science, (A) alike the (B) other social (C) sciences, is not (D) an exact science.

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The diesel engine was named_____its inventor Rudolf Diesel.