Some researchers believe that there is no doubt ______a cure for AIDS will be found.

       A. which               B. whether             C. that                          D. what

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Come and see me whenever ______.

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In class, the students are __________ in the teacher’s words.

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Bessie seemed __________ steadily.

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After a short ________, I got my bag from the thief’s hand successfully.

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–Let’s go Dutch for this supper, OK?

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