It’s one’s bad habits, rather than a certain natural disaster, one’s longevity (长寿)for most of the time.
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.