把剩菜存放在一个密封容器里以保持新鲜。

Store the leftovers in an ___airtight ___container to keep them fresh.

回收箱里装满了塑料饮料容器。

The recycling bin is full of plastic drink ___containers.

过度使用一次性包装是一个主要的环境问题。

The excessive use of disposable ___containers is a major environmental concern.