Definition: the cover or lid used to close a container or pen Level: C1
我找不到这个容器的盖子。
I can't find the ___top for this container.
你应该知道，你所有的垃圾都应该放在楼下那个有红色盖子的灰色容器里。
You should know that all the garbage you have should be left downstairs in the gray container with the red ___top.
使用后确保把笔盖盖回笔上。
Make sure to put the ___top back on the pen after using it.
