【C7】A．ButB．ThoughC．MoreoverD．Nevertheless

【C14】A．neverthelessB．howeverC．moreoverD．therefore

【C18】A．HoweverB．YetC．MoreoverD．Thus

【C15】A．ThereforeB．HoweverC．MoreoverD．And

【C7】A．NeverthelessB．HoweverC．MoreoverD．Although

【C9】A．butB．thoughC．soD．if

【C7】A．howeverB．thoughC．asD．when