________ astronauts cannot go to a baseball game or a movie in orbit , there are many familiar activities that they can still enjoy


  1. A.
    While
  2. B.
    Since
  3. C.
    Before
  4. D.
    Unless
A
試題分析: 考查連詞用法。A當(dāng)。。時(shí)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(xiàng)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。
考點(diǎn)：考查連詞用法。
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