单项选择题
Questions 29 and 30 are based on the following news. At the end of the news item, you will be given 10 seconds to answer the questions. Now, listen to the news.
Which of the following details in the news is CORRECT（）
A．The rescue operation involved many people.
B．The cause of the explosions has been determined.
C．Rescue efforts were stopped on Thursday.
D．The explosions didn’t destroy the building.