【C6】A．ThenB．HoweverC．FurtherD．Moreover

【C16】A．YetB．HoweverC．SoD．Moreover

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

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

【C6】A．AndB．HoweverC．ThereforeD．So

【C6】A．longerB．fartherC．furtherD．deeper

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