听力原文：Can I have your attention, please? Passengers waiting for flight GE sixty-four, there's been a gate changE.Let me repeat that: Flight GE sixty-four, flying to Charlotte and then on to Miami, is NOT departing from Gate F-twenty-seven. Flight GE sixty-four will depart from Gate B-ninE.The departure time has been pushed back from four o'clock to four-fifteen. A shuttle to concourse B will be arriving shortly. We're sorry for the inconvenience, but the plane that is currently here at Gate F-twenty-seven is experiencing mechanical troubles and will not be going anywhere for a whilE.So we'll be taking off from Gate B-nine insteaD.Thank you for your patiencE. What is the purpose of this announcement? A.To announce the arrival of a flight B.To notify passengers of a gate change C.To advise travelers about a new security procedure D.To let passengers know where their baggage will arrive
A.What B.To C.To D.To E.To
【参考答案】
B 解析：广播开始的时候说“there's been a gate change”告知乘客登机口变更事项，接下来......