We must take steps to prevent the __________ world population. A．explodedB．explodingC．explosionD．exp

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• _____a written permission, he had to write another letter to the president of the university.A．Not g
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• ___ himself ___ , he had to shout at the top of his voice.A．Made.. heardB．Making.. to hearC．Made..
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• To gain honor for our country, we will try our best_____ the game. A．competing in B．competing agains
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• It was reported that 115 miners__________ in the flooded mine for eight days were pulled out alive a
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• Those students ___ in this topic may joing us in the disscussion.A．interestingB．interestedC．are inte
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