题目内容：

1、There is a big tree behind my house .It is about _____.
A .20 metre high B .high 20 metre C.high20metres D.20 metres high
______
解析：____________________________________________________
2、I like sking better than climbing because Ithink climbing is _____sking.
A not as exciting as B not as more exciting as
C not as most exciting as D more exciting than
_______
解析：_________________________________________________