同学你好，该知识点来自沪江网校《英语零基础直达大学六级【听说升级版 3月班 】》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。

同学你好～
could not help doing的意思是“禁不住做某事”
I could not help asking that what happen to college students? 我禁不住问这些大学生是怎么了？
这句话的意思是：当我听到他的声音，我禁不住想起了我父亲。

think of想起
I can think of at least three occasions when he arrived late.
我记得他至少迟到过三次。
I can't think of her name at the moment.
我一时想不起她的名字。

祝同学学习进步～