单项选择题

The purpose of the experiment conducted by the scientists is to ______.

A．win a gradual victory over death and aging
B．extend a person's life when he has an incurable disease
C．bring youth back to a person when he becomes very old
D．find a way to cure incurable diseases such as AIDS

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热门试题

单项选择题

Whenever it is leisure time, people will ______.

A．find it difficult to decide what to do
B．make a careful plan in what to do
C．do anything they are interested in
D．go to the playground

单项选择题

According to the passage, leisure is not the time to ______.

A．seek pleasure
B．recover from the physical and mental fatigue of work
C．make preparations for the work of the next period of time
D．free ourselves from the pressure of the work