我弟弟三岁就会自己穿衣服了。

My little brother ___can dress himself at the age of three.

你可以在图书馆借五本书。

You ___can borrow up to five books from the library.

能帮我拿一下外套吗？

___Can you help me with my coat, please?

如果你不抓紧时间，可能会错过这班火车。

If you don't hurry, you ___could miss this train.