描述事物惊人的形容词表达 — 英语词汇题
题目
根据首字母及中文释义补全本单元形容词：1. The view of Zhangye's colorful mountains is truly a________（令人惊叹的）. 2. The speed of the high-speed train is u________（难以置信的）—it runs over 300 km per hour. 3. The n________（自然的）beauty of Jiuzhaigou attracts visitors from all over the world.