To protect the environment, the local government has put up a lot of ______ to warn the citizens not to litter the ground.
An athlete can’t play balls well without severe ______.
I ______ the time ______ so quickly.
______ terrible life the people in the mountains lived at that time!
Our teacher lives in a poorly decorated apartment, ______ the south.
I was about to leave my house______ the telephone rang.