---What do you think of Duan Linxi’s song ?

---I think it’s ________best song in the world. Isn’t it _______ beautiful one?

A．the, the

B．a, a

C．the, a

D．a, the

河姆渡遗址在哪个省份（）

A、上海

B、北京

C、安徽

D、浙江