(1) Don't go skating today—there are dangerous in the ice. (2) The police to the crowd not to panic. (3) Everyone should treasure his or her life. (4) This drug will your discomfort. (5) Cultural exchange also promotes understanding in a/an world. (6) Our goal must be the preservation of the environment. (7) I found it hard to with any of the characters in the film. (8) You need to be to survive in the jungle. (9) He earns a/an amount of money. (10) The goalkeeper the ball twice before kicking it.