登山者把背包放在路边休息。

A hiker rests his ___backpack by the path.

那位旅行者把他所有的行李都装在一个小背包里背在背上。

The traveler carried all his belongings in a small ___backpack on his back.

我买了一个新的红色背包去上学。

I bought a new red ___backpack for school.