unit3,checkout 1、postcards
2、mall
3、outdoor
4、planning
5、costs
6、cheapest
7、joining
8—12 AACAB
13—17 BADCD
18、D
19、D
20—24 ABBAD
25、ball
26、window
27、shouted
28、still
29、later
30、going
31、with
32、let
33、finished
34、aren't 55页：
四：ABBAD
五：language lose passed hotel way smiled money policeman side stop
57页：
一：taking working open goes 5.to finish 6.will fly 7.doesn't rain will play 8.felt
二：
1.keep your eyes open
2.at the same time
3.have a travel from the earth to the moon
4.Amazing things
5.walk on tiptoe
6.without lightning
7.plant life
8.a strange UFO
三：ABCDBD
四：
1.there are full of amazing things in the word
2.Do you think elephant is the biggest animal on land?
3.we can't live without air.
4.it takes me 2 hours and a half to do my homework
5.do you know that fish sleep with eyes open?
58页：
CCAA
Reading(A):
一：1.time 2.whisper 3.nothing 4.suddenly 5.frightening 6.ghost 7.searched 8.surprise 9.centre
二:searches bushes ghosts suddenly yourselves frightened unsual following
59页：
三：
1.they didn't see anything unsual the next day
2.I belive that nothing happende to him last sunday.
3.they went to the history museum by underground as usual.
4.we should learn how to take care of ourselves
5.he isn't afraid of that strange animal any more.
四：ACBBDDCCBBDCADB
60页：
一：
sound to travel seeing sleep is is isn't work to play
went
二：
ACABBC
