下列说法正确的是[ ]

A.pH=0的溶液既不显酸性，也不显碱性，呈中性

B.碱类物质一定能使酚酞试液变红

C.有盐和水生成的反应不一定是中和反应

D.现要测定某溶液的pH，若事先用水把pH试纸润湿再测，则实际测得值与真实值比较将偏大

—Did Mr.White tell you _____?            

—Yes. He said he went there in 2003.          [ ]

A. when he traveled to Tibet      

B. how he goes to Wuhan          

C. where he spent his holiday    

D. why did he visit Kunming