of后面加什么物主代词

　　Sunlight consists of different wavelengths of radiation.

　　阳光由波长不同的射线组成。

　　She was possessed of exceptional powers of concentration.

　　她有高超的专注能力。

　　It was week five of my tour of the major cities of Europe.

　　这是我在欧洲主要城市旅行的第5周。