Only when early, enjoy the fresh air.
Passengers on board aren't allowed _____ calls during take-off.
—People in Southwest China have never experienced _____ natural disaster. —Exactly.Let's do our bit to help them.
When you talk about a person's _____, you are referring to the country, race, or social class of their parents or ancestors.
Do you think _____ possible to work out a correct figure of the income that the Expo will bring to China?
—You've finally figured out the puzzle! —Yeah, in a complex way, _____.