听下面一段独白，回答以下小题。
【小题1】What is the speech based on?

A．The speaker's own experiences.

B．Susan Meadow's experiences.

C．The research by Professor Susan Meadow.

【小题2】What has Professor Meadow been studying?

A．Languages.

B．Gestures.

C．Hands.

【小题3】What kind of people is mentioned in the text?

A．Those who are unable to see.

B．Those who are unable to hear.

C．Those who are unable to walk properly.

【小题4】How do people get the ability of gesturing?

A．They are born with it.

B．They learn it from others.

C．They learn it by accident.