-We __________ play football on the busy road, it’s dangerous. -I agree with you. We should keep safe. A. needn’t B. mustn’t C. may not
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.