根据《关于促进基本公共卫生服务逐步均等化的意见》，重大公共卫生服务项目主要通过（）组织实施。

A.公办医院

B.社会力量举办的医院

C.专业公共卫生机构

D.城乡基层医疗卫生机构

— Has Tom finished his article on the endangered animals?

— Not yet. He ____ only 200 words by the end of last month. [ ]

A. has written

B. had wrote

C. had written

D. wrote