Paul’s parents were worried that he ____ too much timechatting on line.

. Reading books is very important for developing the students’ understanding of the world, _______?

Most Brazilians get along well with each other， _________ they are from different races(种族)， including Americans， European settlers， and Africans，.

Helen _________ go on the trip with us, but she isn’t quite sure yet.

We are glad to see the suggestions _____ by the Students’ Union have turned out to be working ratherwell. [ ]