Điền từ thích hợp vào chỗ chấm

1. Christopher Columbus was a famous Italian____________.(EXPLORE)
2.  My teacher said volcanic activity_______the mountains that we see today.(PROMATION)
3. Francisco de Orellana was the first European to make an _________ of the Amazon River.(EXPLORE)
4. THe cave is not______ because of its narrow entrance.(ACCESS)
5. Junko Tabei was the first _________ to reach the summit of Mout Everest.(MOUNT)