完形填空。
根据短文内容，从A、B、C、D 四个选项中选出一个能填入相应空格内的最佳答案。
Hiking is an activity of going out ________ a long walk for pleasure.
People often go hiking in mountains. The activity is so popular that there are a large number of hikers throughout the world. Some hikers enjoy ________something from nature; some like to see different________ of trees, rocks and animals; ________ love this activity because it helps people release pressure (减压) and stay________.
People like hiking because________two reasons. Hiking ________ people ________ money. A good pair of hiking boot (靴) and some________clothes are enough. What’s more, hiking suits people in any season and almost in any weather. Since we have known hiking is so helpful, let’s ________ hiking this Sunday!

A．of B．for C．to D．on

A．learn B．to learn C．learning D．to learning

A．kinds B．kind C．ways D．way

A．other B．the other C．others D．another

A．health B．healthier C．healthily D．healthy

A．in B．of C．/ D．at

A．don’t cost B．didn’t cost C．isn’t cost D．doesn’t cost

A．many B．too many C．much D．much too

A．comfortable B．beautiful C．expensive D．thick

A．go B．to go C．going D．goes