____ has been proved again and again that ____ is said in the ads greatly affects people’s impression of the products.

She may have been caught in the heavy traffic, ____ she won’t arrive here by five o’clock.

David is such a good boy _______ all the teachers like. 

My detective work finally led me to the ship　　　 I found Godfrey.

The view ____ many scientists hold is ____ too much emission of carbon dioxide is destructive.