【C10】A．ifB．thoughC．becauseD．while

【C8】A．ifB．whenC．whileD．as

【C10】A．BecauseB．ThoughC．WhetherD．If

【C10】A．whenB．thoughC．whileD．however

【C13】A．thatB．thoughC．becauseD．but

【C10】A．as ifB．as thoughC．as forD．as

【C5】A．ifB．whereasC．whileD．although