Passage Three
Questions 32 to 35 are based on the passage you have just heard.

A．He knows her from their elementary school science class.
B．She knows him from computer science class.
C．They went to the same high school.
D．She is his sister.

A．they do not listen carefully to their mothers
B．their mothers are not intelligent enough to help them
C．their brains have to absorb too much language at once
D．their mothers do not respond to their attempts to speak