Definition: If something is spare, it is available to use, because it is extra and not being used. Level: B1
我有很多空闲时间。
I have a lot of ___spare time.
我们有一间空余的卧室给客人住。
We have a ___spare bedroom for guests.
你有备用的笔吗？我的没水了。
Do you have a ___spare pen? Mine ran out of ink.
