_____ energy, shut off the hot water after you take a shower.
--- There is something wrong with my radio. --- ______ _. I can mend it for you.
It’s very dangerous ______ _ children to cross the busy street.
--- Which of the two T-shirts do you prefer? ---_______ is OK. I don’t like their styles.
While I was walking along the lake, I saw some fish _____ out of the water.
--- Have you got ______ ready for the sports meeting?--- Not yet. We still have _____ to do.