has been heated discussion over which country bakes the world's best pizza: Italy, where pizza

began or the US, where it was globalized. [      ]

A. It                

B. There              

C. That                

D. This

河湟地区是以汉族为主体，兼有回族、藏族、土族、撒拉族等近（）个民族。

A.29

B.30

C.54

D.32