In this section, you will hear several news items.
Listen to them carefully and then answer the questions that
follow.
Questions 21 to 23 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.
What were the villagers doing when the explosion occurred
A．They were celebrating a festival. B．They were doing experiments. C．They were working in the factory. D．They were idling in the street.