–Excuse me, Madame. Is this plane ______
题型：选择题
问题：
–Excuse me, Madame. Is this plane __________ take off soon?
–Oh, yes. In five minutes.
A．about to
B．starting to
C．beginning to
D．to
–Excuse me, Madame. Is this plane __________ take off soon?
–Oh, yes. In five minutes.
A．about to
B．starting to
C．beginning to
D．to