【C5】A．andB．howeverC．soD．therefore

【C16】A．YetB．HoweverC．SoD．Moreover

A．andB．orC．soD．but

A．soB．HoweverC．BesidesD．Therefore

【C2】A．moreoverB．howeverC．thereforeD．nevertheless

A．ThereforeB．HoweverC．SoD．otherwise

【C6】A．besidesB．howeverC．thereforeD．undoubtedly