SectionA:
一、1.c 2.d 3.a 4.f
二、1.calmer
2.wilder
3.more interesting
4.larger
5.funnier
6.easier
7.redder
8.newer
9.older
10.finer
三、1.ball；heavier；than；bag；lighter；than
2.the longest；shorter；than
3.small；big；are；smaller
四、1.laugh
2.healthier
3.listening
4.beats
5.longer
6.good
7.care
五、1.In some ways,we look the same.
2.He likes to do the same things as me.
3.However,we both like going to the parites.
4.palying
5.I don't think differences are important in friendship.
SectionB:
一、1.stay at home
2.two years ago
3.be good at math
4.stop doing homework
5.make me happy
6.更流行
7.一名小学生
8.一名更好的学生
9.停下来去看书
10.更外向
二、1.funny;funnier
2.calmer
3.more serious
4.more intellectual
5.happier
6.stronger
7.thinner
8.popular
三、BCDEA
四、1.B earlier
2.A more
3.B ;lived
4.C laugh
5.B big
单元自测：
一、
1-5 DBCDB
6-10 CCCAD
11-15 BCCBD
二、1-5 CBDAC
6-10 BBCAD
三、1-5 CBACD
6-10 CACBD
四、DBAEC
五、1.twice large
2.How much is
3.a with
4.how to
5.If don't
六、1.photos 2.ways
3.eyes
4.shorter
5.hers
6.sports
7.more outgoing
8.going
9.parties
10.us
七、1.happier
2.both
3.staying
4.healthier
5.most
6.Although
7.playing
8.views
9.angry
10.whole
八、1.younger shorter
2.old taller heavier
3.older
4.shorter thinner
5.heavy younge
