It’s important ___ us to protect the environment and it’s wise ____ us to save water .
—Lisa has made great progress these days. --_____ , and ______.
It’s too late. All of us are very_____.
He got the first prize in the match and we are all____him.
Mr Smith is friendly___us ,But he is very strict_____our studies.
You’d better get your clothes____for they’re so dirty.