问题描述：
句子改错划线部分1.how long have you begun tostudy English? 2.i have borrowed this book for two weeks 3.the river has become very dirty since last August 4.our manager is away today.he has been to guangzhou on business 5.he has gone out for two years 第一个begun to study划线 第二个borrowed 第三become 第四been 第五gone
问题解答：
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