中国作为疆域辽阔，人口众多，历史悠久的国家，应该对人类有较大的贡献。

A.Since China has a vast territory, a big population and a long history, She should make gre
B.China, with a vast territory, a big population and a long history should make greater cont
C.A country with a vast territory, a big population and a long history,
D.Having a vast territory, a big population and a long history, China should make greater co