Have you ever wondered why some of thesmartest students in your class sometimes ________ failing exams

My father ____ my brother for driving but he wanted to pick ____ the knowledge of the computer during his spare time.

The victims of the domestic violence, _____were often silent in the past,now choose to call for various help.

I asked my lawyer ______say in court.

The view________many scientists hold is________too much emission （排放）of carbon dioxide is destructive.