同学你好，该知识点来自沪江网校《英语零基础直达大学四级【抢学班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学好：
这里选2。
根据课文第2-3行 ‘I left the money in my room,’ I said, ‘and it's not there now’, 只有 2 someone had stolen his money “有人偷了他的钱”符合作者的推测。
其他3个选择都不对。参考 ---
1 he had lost his money，他把钱丢了；
3 the manager had the money，钱在经理那儿；
4 the girl had stolen the money，那个女孩偷了钱。

祝学习愉快！