Do you know him—I’m sure I’ve seen him _____, but I can’t remember the right place.

Our teacher says reading in the sun isn’t good _______ our eyes.

You didn’t use to like him much when we were at school, ___________?

I heard the news about the missing airplane MH370 ________ the morning of 8th March, 2014.

The reason why he was late was ___he had taken a wrong bus.