补全对话。
A：
B．I went to Sichuan over the holiday.
A：
B：I went there by train.
A：Did you see pandas?
B：And I saw elephants，too.
A：
B：Yes，they are big.They are much bigger than the pandas.
A：
B：Yes，I took many pictures.

A．Yes，I did. B．Are they big? C．Where did you go over the holiday? D．Did you take pictures? E．How did you go there?