The parents were unsettled for the first few days,           about their son’s safety.

　　　 with an important decision, one that can affect his future, he doesn’t know what to do.

His father possesses a __________ factory, which does most of the pollution to this river.

The snow storm left,      a lot of damage to this area.

 On entering the office, I found Mr. Thompson _____ at the desk and _____ something.