【C12】A．whenB．thoughC．untilD．for

【C12】A．whenB．whateverC．whereD．how

【C10】A．whenB．thoughC．whileD．however

【C10】A．whenB．afterC．untilD．while

【C9】A．whenB．ifC．untilD．after

【C12】A．beforeB．unlessC．untilD．once

The couple had no sooner got to the station_____the coach left.（2009)A．whenB．asC．untilD．th