题目内容

— Flight MU257 ______, I must be off now.
— Have a nice trip.
A．is being announcedB．has announced
C．was announcingD．had been announced.
A
本题考查时态。根据语境I must be off now 可知，MU257航班正在被播报，故用现在进行时的被动语态，故选A。
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