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—How are you getting along with your presentation? —Almost ready, and I ______ all I am supposed to.
11个月前
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________ you have seen both fighters，________ will win?
1年前
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A 3G mobile phone, ______to be most useful and fashionable, is popular with some teenagers.
1年前
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用久了的电灯泡会变黑，是因为钨丝受热产生______现象，然后钨蒸气又在灯泡壁上______的缘故．
1年前
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For many years, no one could communicate with people who had been born without hearing.
1年前