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来源：学生作业帮编辑：大师作文网作业帮分类：英语作业时间：2024/11/18 20:08:57

解题思路：填空题先要读懂短文和句子意思，弄清语言环境，注意句中提供的信息，再结合空缺处所作句子成分及前后搭配进行合理判断。
解题过程：
11。have put 12.has left 13.have , waited 14.has visisted 15. has played 16.joined , has been 17.hasn't written 18.has saved

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