Paper produced every year is __________ the world’s production of vehicles. 

 Worried about the time ________， Mary had made a list of the sites she wanted to see in Beijing.

The woman got nothing in _______for her kindness, which made her very upset.

 I went through about four years of being         to video games but fortunately I managed to get rid of it.

 Students ________ remain in their seats until all the papers have been collected.