[ 单选题 ] 中 

I shall never forget 9 a.m. on Oct.12, 2005，the most exciting moment, __________ Shenzhou VI was launched, _________ is always making me think of how I can do more for my homeland.
  • A、 
    that; which
  • B、 
    which; that
  • C、 
    when; as
  • D、 
    when; which
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