---Is that Lucy’s sister, Lily?---No, it _______ be her. She has gone to English.

Rose, you       leave your school things on the floor like this. Keep your room clean and tidy.

You _______ write the poem down. Our teacher will give us a copy. 

(2012·重庆高考)—________ you interrupt now? Can't you see I'm on the phone?—Sorry Sir, but it's urgent.

“No student,” the headteacher stressed, “_______ go out of the school after ten o’clock at night without my permission.”