【C10】A．whenB．thoughC．whileD．however

【C10】A．BecauseB．ThoughC．WhetherD．If

【C12】A．whenB．thoughC．untilD．for

【C4】A．whenB．althoughC．butD．while

【C10】A．whenB．afterC．untilD．while

【C10】A．as ifB．as thoughC．as forD．as

【C10】A．whenB．whereC．whichD．that