A．Under no circumstance can you drink more than a gallon of tea a day. 
B．Black tea can be seen as a cure for heart disease. 
C．Drinking tea does no harm at all, regardless of how much you consume. 
D．Tea Council's participation into the research may decrease its credibility. 

A．His books have been sold worldwide．
B．He can speak and write eight languages．
C．His lifestyle is well-known in the world．
D．He has been to many counties before．