【C14】A．AndB．WhileC．ThenD．Or

A．and B．whileC．but D．or

【C4】A．thatB．whileC．thenD．when

A．HoweverB．WhileC．ThenD．Therefore

A．andB．norC．or

【C17】A．andB．whileC．butD．or

【C14】A．andB．soC．butD．as