单项选择题


Questions 21 to 23 are based on the following news. At the end of the news item, you will be given i5 seconds to answer the questions.
Now listen to the news.

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单项选择题
According to the news, the plane crashed ______.
A．shortly before it landed
B．minutes after it took off
C．after it cleared the mountain
D．at the foot of the mountain
单项选择题
Following the prison breakout, the government is to ______.
A．restructure the prison service
B．discipline some prison officers
C．recruit more security staff
D．look into security conditions
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