单项选择题

A．Airlines plan to develop new operating procedures.B．T……

Question 6 is 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.

A．Airlines plan to develop new operating procedures.
B．The hardware installed in aircraft has been approved.
C．UK Airlines will step up the training of cabin crew.
D．The use of mobiles will soon be allowed on aircraft.

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单项选择题______is the act performed in saying something; it is an expression of the speaker's intention.

______is the act performed in saying something; it is an expression of the speaker's intention.