《China is the third nation that sent a person into space》SectionB PPT
《China is the third nation that sent a person into space》SectionB PPT第2页

He is an American astronaut who was the first man to set foot on the moon.

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定语从句

先行词

Review

Shenzhou Ⅹ is a spaceship that/which was launched with three astronauts in 2013.