从方框中选出合适答语
31．Thanks a lot．
32．When was the zipper invented？
33．Don't take photos in the museum．
34．Who's that speaking？
35．I won the first prize in the competition．
A．This is Mary speaking． B．You did a good job． C．It's a pleasure． D．It was invented in 1893． E．Sorry，I won't do it again． F．Good luck |