— ______ is a ticket to Garden Expo?— It’s about 100 yuan.
—Will there be more roads in the future? —_____.Then people will get somewhere easily.
Everyone in our class played a part _________ our next trip.
— Do you like this MP3 player, Tom?— Yes. It can play beautiful music, ______ it’s very expensive.
The earth is our home. I hope there will be more trees and ____ pollution.
The teacher is ______ Tony, because he often sleeps in class.