Eco-travel is a form of travel that ______ normal tourism with learning and it is more environmentally-friendly.

A. exchanges         B. shares                      C. combines                 D. matches

Eco-travel is a form of travel ____ combines normal tourism with learning—a way to find out

　 what can be done to help animals, plants and people ____.

　 A. what; as well B. that; as well　　 C. that; as well　　 D. that; as well as