We reached 1._____ in autumn. The snow was beginning to fall. We just looked like _____ riding bicycles. It was so cold that our water bottles _____. But the view was wonderful. I didn’t need to _____ Wang Wei because I knew she was very _____. It was difficult to climb the mountains, but at the top it was so high as if we were _____ through clouds. Down the hills, it _____ became warmer. And we could see butterflies _____ around us and yaks _____ green grass.