The general election in America is held every ______ years.
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Three political divisions on the island of Great Britain: ______, ______, ______.
The United States was ranked ______ in the world by the size of land areas.
A. third
B. second
C. fifth
D. fourth
Modern football originates from ______.
分项工程应在施工单位自检的基础上,由______组织施工单位专业技术质量负责人进行验收。
A. 总工程师
B. 监理工程师
C. 项目经理
D. 技术人员