---- It is the second time that I _________ to Shanghai.

   ----- What great changes! It’s ten years since I _______ there last time.

A. have been; went   B. had been; went    C. am; had been    D. come; had been

---- It is the second time that I _________ to Shanghai.

---- What great changes! It’s ten years since I _______ it last time.

A．have been; left          B．had been; left             C．am; had left            D．come; had left