增强内容 第二章 上班上学 第3个中心句: I run up the stairs. 我跑上楼梯。 请试着说出接下来的三个动作: 我通过检票口。  --> I go through the wicket.（要经过检票口所以用 go through） 我叫出租车。  --> I flag down a taxi. /       I flag a taxi.（ flag 作名词是“旗子”，作动词是“示意，招呼，拦下”的意思。flag 可以用 get，hail 代替，如果是打电话叫车用 call） 我看看手表。  --> I look at my watch. 试着说出下面三种心理活动: 我喘不过来气。 --> I'm running out of breath. /        I'm out of breath. 出租车虽然贵，但总比迟到好。  --> Taxis are expensive, but it's better than being late. /  Taking taxi is expensive, but it's better than being late. /  It's expensive to take a taxi, but it's better than being late. 糟了！我忘记锁门了。  --> Oh, no! I forgot to lock the door!