Mickey Mouse arrived on the world's cultural stage ______.

A．knows many foreign languages
B．plays an important role in cross-cultural communication
C．has always been the most popular Disney character
D．has his face changed frequently

A．hospital teaching across the country is similar
B．each hospital has at least one part-time teacher
C．all hospitals surveyed offer education to children
D．only one-fourth of the hospitals have full-time teachers