Please don’t drop litter _______, you should throw it into the dustbin _______.
— Listen! Is that Millie playing the piano in the room? — No, It_____ be Millie, she has gone to London.
He’s seldom late for class, ____ he? _____,even though the weather is very bad.
— Will you buy this tie for Dad? — I have no idea. I don’t know or not the colour matches his new shirt.
— Do you think Andy can be a good policeman? — Yes, I think so. He has the ability to stay when something dangerous happens.
Usually, it’s easier to make decision than to take action.