2.  They got up early this morning so as to c__________ the early bus.

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(       )1.Students shouldn't watch TV every night.

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(2014 •天津）Is there intelligent (有智力的）life on other planets? For years, scientists said "no," or "we don't know. ，， But today this is changing. Seth Shostak and Alexandra Barnett are astronomers (天文學(xué)家).They believe intelligent life exists (存在) somewhere in the universe. They also think we will soon contact these beings (人，生物).

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