C. Embarrassed D. Comfortable

3.Why did Bob keep that little red leaf?

　A. It was a care from a girl

　B. It was a symbol of enthusiasm

　C. It was a reminder of his painful days

　D. It represented the knowledge of trees

4.Which of the following can be the best title for the text?

　A.A Simple Red Leaf B.A Strange Neighbor

　C. An Unusual Friend D.A Greeting From A girl

　　【文章大意】本文是一篇记叙文。每天上学的路上，我和女儿总会遇见一位男士，女儿总会给他打招呼，但没有得到答复，有一天当女儿给他摘一片红色的树叶的时候，再次打招呼的时候，这次得到了答复。多年后在女儿毕业的时候，这位男士送给女儿一本书，上面印有各种各样的植物和树，还有女儿曾经送给他的那片树叶，在那片树叶里包含着那位男士痛苦的过去。

1.D 【解析】细节理解题。根据文中But her cheerfulness soon faded when the man didn't look at her and say "Hi" back.及As we continued on our walk to school, my daughter asked why the man didn't want to say hi to her. Because I didn't have an answer,的提示可知令那位女孩困惑的是那位男士没有回答她的问候，故选D。

3.A 【解析】推理判断题。根据文中later I knew that Bob lost his wife in a car accident.的描述可知当时Bob刚刚失去自己的妻子，而女儿的行为让他很感动，所以保存下来这片红色的叶子，从而当作对自己痛苦时光的回忆，故选A。

4.A 【解析】主旨大意题。根据文中的描述可知这片红色的叶子一直贯穿全文，就是因为它才使故事得以发展，因此，一片红色的叶子就是该文的主旨，故选A。

Whenever we see a button, we want to press it because we know that something will happen.This is true in most cases, for example, on a doorbell.But some buttons are actually fake(假的), like the "close" button on a lift.