单项选择题

According to the passage, ______.

A．a long time ago, man did not know how to make use of wood
B．trees are not as useful as they were in the past
C．trees were more found in the past than they are today
D．people have 'always found trees useful

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单项选择题

The thing Jules described in his book From the Earth to the Moon is ______.

A．as large as the spaceship today.
B．similar to the spaceship today.
C．a gun used to send up a ship.
D．an underwater ship.

单项选择题

Jules wrote a lot of exciting books partly because he ______.

A．liked to do much reading on science
B．liked reading fairy tales
C．was a great inventor
D．was a famous scientist