— _______ is the plane taking off?—In twenty minutes.A. How far B. How long C. How soon
Luckily, all the students got out of the teaching building _ it fell down.
—How are you going to the train station to meet your aunt? —I'm going there ______ my car.
By _______ way, is _______ man in _______ red your brother?
I don't know when ______.
_____ he _____I am a doctor.