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-Flight 551 for Dallas ．I must be off now． -Have a pleasant trip then． [ ] A． ha

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-Flight 551 for Dallas ．I must be off now． -Have a pleasant trip then． [ ] A． ha

－Flight 551 for Dallas ________．I must be off now．

－Have a pleasant trip then．

[]A．

had been announced

B．

has announced

C．

was announcing

D．

is being announced

试题答案

答案：D

标签：offbenowpleasanthave

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