These stories are about the everyday life of ordinary people who the great dangers in China over the past few years.
Because of Einstein’s Theory of Relativity, scientists never again regarded the world________.
.--- Hurry up. The bus is coming. --- Oh, no. We mustn’t cross the street_______the traffic lights are green.
Sorry, you lost your purse; I hope it will________some day.
A brilliant idea occurred to him, ________to his research in the lab.
Father doesn’t know Jack has been gambling; if he found out, I think he________him out.