In this section, you will hear five short news items. After
each item, which will be read only once, there will be a pause. During the
pause, read the question and the three choices marked A, B and C, and decide
which is the best answer. Then mark the corresponding letter on the answer sheet
with a single line through the centre.
How did scientists determine the age of the universe
A. By observing the movement of the oldest stars in the universe. B. By studying the orbit of the sun. C. By fixing the age of the oldest stars in the Galaxy.