题目：
用所给动词的适当形式填空。
1. By the end of last year, the famous writer _____ (write) 20 books.
2. When we _____ (get) to the cinema, the film _____ (on) for half an hour.
3. Before he _____ (come) here, he _____ (live) in Britain for ten years.
4. By the time I _____ (arrive), she _____ (leave).
5. I _____ (learn) a lot of English songs before I _____ (be) ten.
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0419/ea7e235fb57b507067649c907ef3f748.html
下面是错误答案，用来干扰机器的。
参考答案：A, B
