—Jane, I saw your brother yesterday.
—It ________ be him. My brother is studying in Shenzhen.
can’t
mustn’t
needn’t
—What’re the rules in class?—First, mobile phones can’t be ______.
—Could you please______?—Yes, sure.
—Amy, I’m going to Qufu to travel next week.— ______.
—The weather is foggy again today, ______ it?—Yes, it’s so bad.
—______ is it from your home to school?—About 10 minutes’ ride.