My parents are visiting my grandparents. My 5-year-old brother and I are in our apartment（公寓）. I’m doing my homework and my young brother is watching TV. Then someone knocks at the door. My young brother runs to the door. He thinks that our parents are back. He opens the door.  

A tall man stands outside. He asks, “Is your mother or father at home?” 

Without thinking, my brother says, “No.” 

“Would you like to buy some books?” the man asks. 

“No, thanks,” I say. Then I close the door. But he forces（强迫）his way into our house. He takes out a knife and tells us to keep quiet. Soon, he starts to look for money. I secretly call the police for help with my cell phone. The police come and help us. They thank us and take the man to the police station. 

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1.How old is the writer’s brother?

A 4

B 5

C 6

D 7

解析：选B。B 细节理解题。根据第一段第二句可知，作者的弟弟今年五岁，故选B。

2.What is the writer doing when someone knocks at the door?

A Visiting his grandparents.

B Watching TV.

C Doing his homework.

D Calling the police for help.

解析：选C。C 细节理解题。根据第一段第三句可知，作者正在写作业，故选C。

3.The young boy opens the door because he thinks _______.

A his parents come back

B his friends comes

C his grandparents come

D a policeman comes

解析：选A。A 细节理解题。根据第一段倒数第二句可知，作者的弟弟跑去开门是因为他以为父母回来了，故选A。

4.Why does the man come to the writer’s home?

A To visit them.

B To ask for help.

C To steal money.

D To sell books.

解析：选C。C 细节理解题。根据最后一段第四句可知，这个陌生人是个小偷，是为了偷钱的，而卖书只是一个幌子，故选C。

5.Which of the following is TRUE?

A The writer’s parents are visiting their friends.

B The writer wants to buy a book from the man.

C The writer’s brother has a knife.

D The man is a thief.

解析：选D。D 推理判断题。通读全文可知，作者父母不在家的时候，小偷进了他家，所以得知那个敲门的陌生人是个小偷，故选D。