问题
选择题
—Flight 551 for Dallas ________. I must be off now.
—Have a pleasant trip then.[ ]
A. is being announced
B. has announced
C. was announcing
D. had been announced
答案
答案：A
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—Flight 551 for Dallas ________. I must be off now.
—Have a pleasant trip then.[ ]
A. is being announced
B. has announced
C. was announcing
D. had been announced
答案：A