The teacher called Tom to his officebecause he was caught_____in the exam.

_ at the cafeteria before, Tina didn’t want toeat there again

If we don’t pay much attention to the , the pollution will get worse and worse.

____ it be that is knocking at the door—It ______ be Father, but I’m not sure.

Can you hear me—No, I can’t. Would you please speak_________