Definition: a small, round object used to fasten something, for example a shirt or coat Level: B1
她扣上了外套的纽扣。
She did up the ___button on her coat.
这条裙子的前面有一个装饰性的纽扣。
The dress had a decorative ___button on the front.
他衬衫上掉了一颗纽扣，不得不缝回去。
He lost a ___button from his shirt and had to sew it back on.
