b) Read and mark the sentences T (true) F (false) or DS (doesn´t say)

1.- People used to travel on horse until 3000 BC     DS

2.-Cars dont cost much     T

3.- The ancient egyptians built boats     F

4.- Modern boats are very fast     T

5.-In the 1800 trains ran on electricity     F

6.- A lot of people in big cities     T

7.- The first airplane flew in  1783     F

8.-The airplane is ideal for those who travel long distances    T