Directions: You are allowed thirty minutes to write a composition on the topic: Travel. You should base your composition on the following outline, and write coherently and neatly, in no less than 120 words. Outline:Your essay should be based on the information given below. ①乘飞机旅行有许多长处(方便、快捷、省时、舒适等)。 ②空中旅行也有许多不足之处(机票价格贵,有的旅客不适应空中旅行,常常感到身体不适,甚至有人还担心发生空难)。请你简单阐述上述两个方面。 ③最后请你说明你的看法。