1 . 阅读下列句子并排序，请选择最佳选项。
① The other two local teachers were responsible for maths and Chinese.
② The school had just three teachers and Zhang Tian was the only English teacher.
③ To make school life healthier and livelier for his students, Zhang Tian introduced more subjects to the school — music, art and PE.
④ Their school lives are now more attractive and interesting, and they enjoy playing football in the playground, as well as singing songs they’ve learnt. The school is now full of laughter and music.

A．③②①④

B．①②④③

C．②①③④

D．②①④③