(  )51．A．when    B．as soon as    C．since D．even if

  (  )50．A．heard  。    B．remembered    C．forgotten D．said

  (  )49．A．where to go  B．how to speak    c．what to say D．which to choose

  (  )48．A．no    B．1ittle    C．much D．some

  (  )47．A．though    B．whether    C．after D．if

  (  )46．A．10nely    B．happy    C．excited D．surprised

  (  )45．A．nothing    B．everything    C．anything D．something

  (  )44．A．Between    B．For    C．Among D．With

  (  )43．A．where      B．how         C．why     D．when

  (  )42．A．the earth    B．the moon    C．the country D．the sea