完形填空
阅读下面短文，从短文后各题所给的三个选项（A、B和C）中，选出可以填入空白处的最佳选项。
On Miami Beach, you can see a large group of huge pink snails(蜗牛) creeping(爬行) there. Will you think       they are part of a strange show? The answer is      ! In fact, they are part of an art project to encourage people to have a clean      .
The forty-five huge pink snails are not real snails. They were made by Italian organization Cracking Art Group using       material. These pink snails have       Paris, Milan and Prague. Now, they are placed in the city of Miami. The huge pink snails are designed to make people pay more attention to the       of recycling and its environmental influence. What’s more, they will       a strong art trace(足迹) on the beach.
The project will encourage Miami Beach visitors to       the present living environment and rebuild the       in a new, ­­­healthy way. Besides this, the project also hopes that these snails can help people to       their lives and enjoy their lives better.
A. which          B. what            C. that
A. Yes            B. No              C. OK
A. school         B. environment     C.street
A. recycled       B. repaired        C. colored
A. climbed        B. reached         C. visited
A. difference     B. importance      C. reason
A. play           B. take            C. leave
A. talk about     B. think about     C. worry about
A. city           B. house           C. park
A. slow down     B. make up         C. put away