从下面方框中选择正确的选项补全对话 。

A: What a nice camera!

B: It was invented by Joseph Nicephore Niepee.

A: Oh, I see.

B: In 1827.

A: What's this in English?

B: It's called an English Learning Machine.

A:

B: It maybe made of steel.

A:

B: It is used for helping us to improve our English.
 

A.  What is it made of? B. Who invented it? C. It looks like a recorder. D. Where was it made? E. When was it invented? F. What is it used for?