Questions 23 and 24 are based on the following news. At the end of the news item, you will be given 10 seconds to answer the question.
Now, listen to the news. The space shuttle Discovery completed a(n)______mission landed at the Kennedy Space Centre.

A．To discuss the university childcare programs.
B．To advertise the merits of the kindergarten.
C．To discuss eligibility requirements for the nursery.
D．To argue for private schools as a better form of education.

A．the differences between robots and men
B．the reason why men need to sleep
C．about the need for robots to save power
D．about the danger of men working at night