After a lot of preparation, Joseph Lockwood and Philippa Amos were finally ready to start their journey into the Amazon rainforest. They were feeling (cheer) as they sailed down the great river. Eventually, they got out of the boat and walked into the darkness of the jungle. Neither of them had ever been in such an extreme situation before, using just a compass (指南针) to find the area where the kind of frog they wanted to study (live). Suddenly, Joseph, who was holding the compass, tripped and lost it in a river. The situation seemed hopeless—how would they find the frogs now? But just they started to feel really sad and worried that their journey (be) a failure, they saw the frogs they had come to look for.
