--______do you improve your listening?

-- I improve it ______watching English movies.

A．How; with

B．What; with

C．How; by

D．What; by

杜甫的《解闷十三首》中写道：“不见高人王右丞，蓝田丘壑漫寒藤。”请问诗中的“王右丞”是谁？