A. Hiking through the mountains.
B. An introduction about our school.
C. Stop using bottled water.
D. A famous book on friendship.
E. Earthquake can kill people and animals.
F. Animals" actions for the earthquake. One of my favourite things to do is hiking in mountains. Because nobody likes the idea of getting lost, I always prepare well before every trip. But what"s the best navigation tool, a Global Positioning System (GPS) or a good old map and compass Five of my friends and I hiked through the mountains on a trail I marked. One team of three carried a GPS, and the other team used a map and compass.