He had his camera ready ________ he saw something that would make a good picture.
The first use of atomic weapons was in 1945, and their power increased enormously ever since.
It was reported that 8 policemen were sent to the forest the missing girl.
Scientists are convinced _ the positive effect of laughter physical and mental health.
--- Smoking is bad for your health.--- Yes, I know. But I can’t .
--- What’s wrong with Mr. Brown?--- He said he would come at nine, but he didn’t at that time.