She ______ very hard since she came to our school.
—May I speak to the headmaster?—He’s not here.He _______ Beijing.Can I take a message?
Ann is a careful girl.She always goes over her exercises to ____ here are no mistakes.
Your iPad is quite nice. Where did you buy ______? I want to buy ______, too.
______ difficult questions they are! I can’t answer them.
He left in ______ a hurry that he forgot ______ the door.