【C5】A．ThereforeB．HoweverC．ThenD．Moreover

【C16】A．YetB．HoweverC．SoD．Moreover

A．ThereforeB．HoweverC．SoD．otherwise

【C7】A．CertainlyB．HoweverC．YetD．Moreover

【C19】A．ThereforeB．AlthoughC．SimilarlyD．Moreover

【C4】A．thereforeB．consequentlyC．howeverD．moreover

【C8】A．thereforeB．howeverC．likewiseD．nevertheless