题目内容
. — Flight 551 for Dalas ______. I must be off now.
— Have a pleasant trip then.
A. is being announcedB. has announced C. was announcing D. had been announced
A
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题目内容
. — Flight 551 for Dalas ______. I must be off now.
— Have a pleasant trip then.
A. is being announcedB. has announced C. was announcing D. had been announced
A