1 . 听下面一段较长对话，完成下面图片的描述。

Photo A: A giant dish: when you speak into it, it     1     the sound back and     2    . You can use it to speak in a     3     to someone 17 meters away.

Photo B: A giant     4     that you can use your feet to play. Instead of playing the sounds of a piano, it plays the voices of     5    .

Photo C: You look at a blue screen for a while, and then suddenly you can see     6     moving around on it. These are our     7    .

Photo D: A     8     where you can see yourself reflected thousands of times.

Photo E: You stand in front of     9     and it casts different shadows of you, in     10     the rainbow.