This type of bamboo grows very fast and it will take only three to five years _____ it can be used in various fields . A.before B.since C.when D.as
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【简答题】用所给词的适当形式填空。 1.I don't understand what they are saying because they speak too____(quick). 2.Which watch is____(beautiful),this one or that one? 3.She is writing the letter (careful). 4.-What's your fa...
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