how long have you （）a tour guide A been B become C became D were
题目
how long have you （）a tour guide A been B become C became D were
答案
B 句意：你（）导游多长时间了 根据句意 应该是“成为” 排除A 、D、 因为是 现在完成时 become 的过去分词 还是 become 故 选 B
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我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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