单项选择题

Which of the following is the best title for the passage

A．Take Vacations in Space
B．Flight Regulations in Space Travels
C．Building Hotels in Space
D．Cost of Space Traveling
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单项选择题
Some rich people consider themselves unsuccessful because _________.
A．their life is miserable
B．their goals are too low
C．they do not live in peace
D．they are not rich enough by their own standards
单项选择题
The last paragraph implies that _________.
A．we should have high goals
B．success means taking a walk in the park
C．success means achieving great goals
D．success means trying one's best at what one really likes
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