Questions28 and 30 are based on the following news. At the end of the news item, you will be given 15 seconds to answer the questions. Now listen to the news. According to the passage. The Catastraphic event happened due to ____ .

A．We need our friends to share similar interests and activities.
B．We need our teachers to guide us.
C．We need co-workers to help us.
D．A lonely person’s popularity may be increased with more social contacts.

A．About 200 miles.
B．About 1,000 miles.
C．About 7,000 miles.
D．About 5,000 miles.