问题补充:
Great changes have taken place in China since the People’s Republic of China
in 1949.
A. was found
B. founded
C. was founded
D. found
答案:
A. was found
B. founded
(答案→)C. was founded
D. found
解析:考查动词时态及语态。found成立;根据文中的时间状语in 1949可知应用用一般过去式,句意:自从在1949年中华人民共和国成立以来中国发生了巨大变化。根据语境中华人民共和国是被建立的,所以应用被动语态,故选C。