单项选择题

The team of doctors wanted to find out ______.

A．why certain people age sooner than others
B．how to make people live longer
C．the size of certain people’s brains
D．which people are most intelligent

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单项选择题

Which of the following doesn’t belong to the woman’s suggestions

A．Skin diving.
B．Golfing.
C．Rowing.
D．Canoeing.

单项选择题

What does the woman say about her family

A．They live far away.
B．They frequently invite students to their home.
C．They come from another country.
D．They visit her every weekend.