Read the passage and choose the option that best fits the gaps

Visitors to Viet Nam would like to learn the long history and rich culture. If you ___(1)_________ keen on visiting a place without damaging the environment at the same time, think about taking a bicycle tour and you will find you are rewarded with a very special ecotourism experience. There are many different cycle trips you can ___(2)__________ but a particular favorite one is the tour of the Mekong Delta.
The Mekong Delta has a rich diversity of culture and ___(3)_________ and you can see this ___(4)_________ you slowly travel through this very distinct part of the world.
Vietnamese and Khmer people live alongside Chinese communities, and they all rely on the fertile plains and tributaries of the majestic Mekong River. It is here that many of the villagers use bicycles ___(5)_________ around.