2 Read the dialogue. Choose the best answer (A, B or C). A B My isn't working. Maybe you can't get a it isn't working. In Africa, people use phones. B That's a good idea. What other interesting facts do you know? Did you know that people made paper from N B Yes, I did. But did you know that Greek soldiers had sun? A No. I didn't know that. A B Yes, they used them to send messages. That was very of them, wasn't it? Yes, it was. And the ancient Egyptians could tell the time using the " of a lower on the ground. A That sounds difficult. I'm glad I've got a watch B B Yes, me too. What technology do you like? A I love GPS. It's really cool. Does your dad use a 1 navigation system? 1 2 3 5 6 here. That's why A mobile A battery A solar A plastic A solar A clever A shield 7 A wrist 8 A solar power for their shields which reflected the Yes. Thank goodness! He was always getting lost before! B machine B solar B sun B wood B metal B busy B picture B text B space C prediction C signal C murror C metal C power C confused C shadow C bead € satellite​