He didn’t make ______ clear when and where the meeting would be held.
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.