Part I. Listen to the passage then choose the correct answer. (Track 15)
    1.    People may travel _______ a driverless car.
    A. at    B. in    C. on
2.    Even old and disabled people will be able to use it, because their car can _____ itself.
    A. drive    B. ride    C. pedal
    3.    People can choose to go _______ foot on moving pavements.
    A. with    B. on    C.in
    4.    A Swiss company has invented a system of _______ moving pavements.
    A. high-speed    B. low-speed    C. slow
    5.    More people _______ their vehicles at home.
    A. leave    B. will leaving    C. will leave
Part II. Listen and fill in the missing words. (Track 16)
Son:    Mum, people who live in the city are all (0) wealthy, aren’t they?
Mother:    No. There are some rich people, but there are also people who live in (1)_______.
Son:    Where do they live, Mum?
Mother:     Some people are homeless, and some have to live in (2) _________.
Son:    How are those places?
Mother:    They’re (3) _________and unsafe.
Son:    Do the people living there have good (4) _________?
Mother:    No, they don’t. Therefore, children who live there often have more (5) ________.
Son:    Oh, their lives are so difficult