People are starting to use new type of energy _______ the sun, wind and water.
The boy_________ eats vegetables and _________ does sports, so he isn’t healthy at all.
Many people know Zhang Lei in the Voice of China (中国好声音). He is my _________because he is really good at singing.
My father says he has no time to_________ newspapers in his office.
—Who is the student on the playground?—Andy. _________ often takes a walk with _________.
—May I have a dog at home, Mum?—Yes, you can. But you must know how to _________ it.