—Sure. It's said that a lot of zongzi _________ at the food factory twenty days ago.
— Because humans catch whales for meat, fat and oil. Some of them are .
—That's terrible. We should protect our environment.
—Paper __________first __________about 2,000 years ago in China.
—No problem! I think he to think twice before starting.
—I know, so he ___ still ___ in both China and Canada now.
—Yeah, it ______ nearly 500 years ago.
—I'm afraid not. I'll need one more hour before my homework_______.
—Yes, many old trees and houses .
—I'm not a child any more. I ______ what to do.