Definition: used to give the purpose of something or the reason for doing something Level: A2
我需要一把刀来切这个苹果。
I need a knife ___to cut this apple.
我们用这个应用程序来学习英语。
We use this app ___to learn English.
我正在攒钱买一辆新自行车。
I'm saving money ___to buy a new bike.
