单项选择题

What can we learn about Dr. Marcy from the passage

A．He is fond of watching Jupiter.
B．He is from a scientist family.
C．He dislikes working with Paul Butler.
D．He is interested in finding life in outer spac

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单项选择题

But we stuck with it in the third paragraph means______.

A．they felt discouraged
B．they carried on with it
C．they failed in their attempt
D．they made some progress

单项选择题

Which of the following is time of the recent discovery

A．The planet is not as protective as Jupiter.
B．The planet is close to star 55 Cancri.
C．The planet proves to be a gas planet.
D．The planet is as large as Jupiter.