1.Where is the young man?

A On the street.

B Under a big umbrella.

C On the train.

D .

解析：选C。细节理解题。根据A train stops at a station. A young man wants to come out, but it is raining.可知，年轻男子是在火车上，故选C。

2.What does the young man want to buy ?

A An umbrella. 

B Hamburgers. 

C Dollars.

D .

解析：选B。细节理解题。根据The young man says to the boy, “Can you go and get us two hamburgers...可知，年轻男子想买汉堡，故选B。

3.Who helps the young man?

A A boy.  

B A man.

C Nobody.

D .

解析：选A。细节理解题。根据“Great!” says the boy and he goes to buy hamburgers.可知，男孩帮年轻男子买汉堡，故选A。

4.The boy buys _______ hamburger(s).

A 0

B 1

C 2

D .

解析：选B。细节理解题。根据“Oh, there is only one hamburger left. So I’m eating mine. Here is your dollar. ”可知，最后男孩只买了一个汉堡，故选B。