Matching Pairs IV LEVEL UNIT 4 CHALLENGES Lesson 2Online version Reinforce questions and proper answers. by Martha Uribe 1 What had he been doing when he met the hikers ? 2 Why hadn´t he called for help? 3 What had he done to get away ? 4 How long had he waited in the canyon ? 5 Why hadn´t anyone come to look for him? 6 What had Aron been doing when the accident happend ? He had been walking out of the canyon. Because he hadn´t brought his cell phone with him. Because he hadn´t told anyone where he was going. He had waited in the canyon for five days. He had cut his arm off. He had been climbing in a remote canyon.