—________ we finish the work before class, Jack?—No, we_________ . We can do it after class.

—Look! The man at the gate ______ be our headmaster. He is always standing there every morning.—No, it ______be him. He is holding a meeting in the office now.

—Is Nick coming by train?—He should, but he ________ not. He likes driving his car.

---_____book is this? --- I think it _____ Carla’s. It has his name on it.

One of our rules is that every student       wear school uniform while at school.