在网上寻找具体的参考书上的答案是很难的,在网上是问不到答案的哈
还是自己多思考,不会的找同学询问 大家讨论,对自己是有好处的
I. 1-4 BABB 5-8 BAAC
II. 1. weekends 2. healthy 3. popular 4. hour5. pretty
III. 1. to hike 2. are, going todo 3. to keep4. healthy 5. does, go
IV. 1. much 2. spend 3. a 4. pretty/very 5.good 6.be 7. What 8. jump