We should choose a healthy life style, a low carbon(低碳) life.

n use a large plastics bottle, _________ cut off, as a plot to growflowers in

s Oprah Winfrey puts it, ______ thankful for what you have and you’ll end up having more.

What should we do to the sick boy—We can tell him some funny stories.

Fred entered without knocking and, very out of breath, sank _____ a chair[ ]