阅读下面短文并根据短文内容，从短文后面每题所给的选项中选择最佳答案。

　　Jane Black is only four and isn't old enough to go to school. Her grandpa was a teacher and now stays at home. He teaches the girl to read and write. The girl studies hard and learns a lot. She can count from one to one hundred, read some picture－books and write all the names of her family. Her parents are happy and often show it to others. People often praise(夸奖) her for it.

　　Once Mrs Black took her daughter to a birthday party. The guests(客人) praised a rich woman's son. Mrs Black asked him a few questions, but all his answers were wrong. Jane began to laugh at him. The woman was angry. She told her friend, a teacher, to ask the girl some questions, but the girl answered all of them. The teacher was surprised and thought for a while. Then she asked, “There're three flies(苍蝇) on a table. How many will be left if I kill one.”

　　“One,” answered Jane.

　　“You're wrong,” called out the boy's mother. “All of them fly away.”

　　“Do you think a dead fly can fly, madam?” asked the girl.

　　The guests began to laugh and the woman's face turned red.

1．Jane studies at home because ________.

[　　]

A．her grandpa is a teacher

B．she is too young to go to school

C．she can learn by herself

2．At the party the guests praised the boy because ________.

[　　]

A．he was very clever

B．he knew much

C．his mother was rich

3．The woman was angry because ________.

[　　]

A．her son couldn't answer the questions

B．Jane laughed at her son

C．Jane's mother asked her son the questions

4．Which of the following is true?

[　　]

A．The woman could answer Jane's question.

B．The woman didn't love her son any longer.

C．Jane is much cleverer than the boy.

5．Which is the best title for this passage?

[　　]

A．A Rich Woman

B．A Clever Girl

C．At the Birthday Party