【C10】A．BecauseB．ThoughC．WhetherD．If

A．BecauseB．WhenC．WhetherD．If

【C12】A．becauseB．thatC．whatD．if

【C10】A．whenB．thoughC．whileD．however

【C18】A．becauseB．whileC．whenD．if

【C10】A．as ifB．as thoughC．as forD．as

【C9】A．butB．thoughC．soD．if