Definition: a hard transparent substance that objects such as windows and bottles are made of Level: A1
小心地上的玻璃！
Be careful of the ___glass on the floor!
她把饼干放在一个玻璃罐里。
She keeps cookies in a ___glass jar.
我最喜欢的礼物是一只玻璃做的猫。
My favourite present was a cat made from ___glass.
