—Flight 331______.I'd better be on my way.Good bye.—Bye.Happy landing!A .is announced B.is announcing C.has announced D.is being announced

—Flight 331______.I'd better be on my way.Good bye.—Bye.Happy landing!A .is announced B.is announcing C.has announced D.is being announced
—Flight 331______.I'd better be on my way.Good bye.—Bye.Happy landing!
A .is announced B.is announcing C.has announced D.is being announced

—Flight 331______.I'd better be on my way.Good bye.—Bye.Happy landing!A .is announced B.is announcing C.has announced D.is being announced
B

is announcing
331航班广播登机了。我得上路了（去排队了）
祝你安全降落（旅途愉快）