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        1. ________ astronauts cannot go to a baseball game or a movie in orbit , there are many familiar activities that they can still enjoy.
          A.WhileB.SinceC.BeforeD.Unless
          A

          試題分析: 考查連詞用法。A當(dāng)。。時候,然而,盡管;B既然,自從;C在。。。之前;D除非。前句講宇航員不能做的事,后句說他們還有很多類似的可以做的事,由此可知前后句子意思為轉(zhuǎn)折關(guān)系。所以A選項正確。句意:盡管宇航員在飛行軌道中不能去打棒球或者看電影,他們還是有很多類似的可以娛樂的活動。
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