【C6】A．whichB．whereC．whatD．when

【C8】A．whichB．thatC．whatD．when

【C5】A．whichB．thatC．whatD．than

【C6】A．whichB．thatC．whatD．where

【C5】A．whichB．whereC．whenD．whether

【C10】A．whyB．whereC．whatD．which

【C2】A．whichB．whereC．thatD．when