单项选择题

The passage mainly talks about

A．the intelligent life of other planets
B．the development of intelligent life
C．the reasons why there may be other intelligent life in the universe
D．the history of human exploration of the outer space

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热门试题

单项选择题

If the radio waves had reached our planet one hundred years before, we would have______.

A．sent an immediate answer
B．sent an alarm against extraterrestrial attack
C．sent a short reply
D．sent no answer

单项选择题

The author states that bringing up children ______.

A．is mainly the mother's job
B．is among the duties of the father
C．is the job of schools and churches
D．involves a partnership of equals