---I stayed at a hotel while in New York.---Oh, did you? You ________ with Barbara.

 — Mary, whose photo is it?—It ______ be Lu’s. Those are her parents.

The school rules state that no child ___ be allowed out of the school during the day , unless accompanied by an adult .

 One of our rules is that every student ________ wear school uniform while at school.(2012·辽宁)

—Why, my new computer is rubbish! Five hours has passed and it still hasn’t finished the downloading. —Don’t worry. You know, sometimes the Internet ________ be very slow.