Mary，who's the man over there？

He's my uncle，_____English teacher．（　　）

A．theB．aC．anD．/

As we all know，Wudang Mountain is the ____of Shiyan．（　　）

A．proudB．prideC．progressD．purpose

Prime Minister Li Keqiang arrived in Shiyan____May 23^nd，2016．（　　）

A．atB．onC．inD．from

We must protect plants because they are friends of____．（　　）

A．weB．usC．ourD．ours

Two disabled men from Hebei Province （one is blind and the other has no arms） have spent over ten years____ trees together．（　　）

A．plantB．plantsC．plantingD．planted