1．For many people, riding a bicycle is the easiest and cheapest (便宜的) way to travel today.
2．People making friends online are afraid of getting cheated (欺骗)．
3．Abraham Lincoln only received a limited education during his childhood (童年时代)．
4．The new library is so well equipped that many citizens (市民) can go there to read and borrow books.
5．Susan enjoys classical (古典的) music while her little brother likes pop music.
6．The air is clean (干净的) and the mountains are green in my hometown.
7．Choosing friends with common (共同的) interest is important in building friendship.
8．The dog may be a good compan ion (伙伴) for the old.
9．I regularly compare (比较) what I think with what others have thought.
10．As students, there are many ways that we can serve the community (社区；社会)．
