The young singer has written a number of songs in 2010．His songs are becoming more and more popular．in→since． A B C．题目和参考答案——青夏教育精英家教网—

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15．The young singer has written a number of songs in 2010．His songs are becoming more and more popular．in→since．
A B C．

分析这个年轻的歌手自从2010年以来写了大量歌曲．他的歌将正变得越来越流行．

解答答案：B in→since．根据句意和句中has written判断是现在完成时．in2010在2010年句子应为一般过去时，since2010自从2010年以来是现在完成时的标志．故答案为：in→since

点评本题考察时态与介词短语的一致性，不同的短语应用不同的时态．

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Main idea	School（21）略
Purpose	For students to （22）略themselves．
Some rules	First，try not to get hurt while （23）略．
Some rules	Third，be （24）略 and don′t argue or fight．
Who	It′s important for （25）略 to remember the rules．

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