---Excuse me, sir. You can’t take photos here. Look at the sign.---Sorry. I ______________ the sign.
---Mum, may I go out to play football?---_________ you _________ your homework yet?
Would you mind _________ down the music? The baby is sleeping.
-Excuse me. Could you tell me _________?-Sure. I bought them in a video shop on River Road.
—Are you going to help John with his Chinese this evening?—No, He _______ to England. He will be back here next month.
Haze (雾霾)appears around us. Let’s do ________ helpful to protect the environment.