从方框中选择适当的短语并用其正确形式完成句子。 look down at       go the right way go through, on the edge of      at the bottom of            look across to 1. 'Don't stand the canyon. It's dangerous,' the tour guide said. 2. You must a big gate to enter the house. 3. Have you ever heard the story about a frog a well? 4. I the other side of the road, but saw nothing. 5. Mr Brown didn't know if he was . 6. I the small house 100 metres below me.