A 1、c
2、a
3、a
4、b
B
1、It rolled down the mountain into a farm at the foot of the mountain.
2、An old hen.
3、No, they didn't.
4、Because it wanted to fly.
5、The other eagles.
6、one will return to his or her real family at last.
C
1、 could send back photos and facts
2、No, it isn't
3、a CD
4、40,000 years
5、some sounds and pictures on it
6、at 30,000 kilometres a second