阅读短文，选择正确的答案。
A mother and her young son get into a bus in a small city and sit down. The bus conductor comes to them for their money. The mother says:“I want one ticket to the zoo ” and gives him one Yuan. The conductor looks at the small boy for a few seconds and then says to him, “How old are you, young man?” The mother begins to speak, but the conductor stops her. The boy says: “I am four at home, and two in the buses.” At last the mother has to take fifty fen out of her pocket and gives it to the conductor.
Why does the conductor look at the small boy for a few seconds ?

A．She likes him

B．She thinks the boy need to buy a half-price ticket

C．She knows the small boy.

D．She saw the boy somewhere

Why does the conductor stop the mother and let the boy say?

A．The boy’s words are interesting

B．The mother is a bad mother

C．The small boy can tell the truth

D．She loves the small boy

At last the mother ______________.

A．buys another ticket

B．buys a half-price ticket for the boy

C．says sorry to the conductor

D．gives one Yuan to the conductor

What does the word “conductor” mean?

A．司机

B．售票员

C．乘客

D．警察

From the story we can see ______________.

A．every boy must buy a ticket in the bus

B．when a child is four, he must buy a ticket

C．sometimes a child is more honest（诚实）than his parents

D．women are not good mothers