unit1
1.在人们家中inpeople’shome
2.在家通过电脑学习studyathomeonputers
3.将来inthefuture
4.免费的befree
5.活到200岁livetobe200yearsold
6.一百年之后in100years
7.一张纸apieceofpaper
8.更多/更少的树more/fewertrees
9.更多/更少的污染more/lepollution
10.更少使用地铁usethesubwayless
11.更多使用usesthalot
12.同意某人的意见agreewithsb
13.与谈话talkto/withsb
14.使用某物做某事usesthtodo
15.在上小学beinelemen