Is it only on the world market ________we can prove the competitiveness and quality of our goods?

A．where

B．which

C．that

D．how

在北京奥运会的5个吉祥物中，代表主办城市北京的是（）。

A.贝贝

B.晶晶

C.欢欢

D.莹莹

E.妮妮