---Dad, must we wait until the light becomes green?---Yes, I’m afraid we ______. That’s the traffic rule.

—________ you leave your room in such a mess?—Sorry，Mum.I forgot to tidy it up.

Sometimes smiles around the world ________ be false, hiding other feelings like anger, fear or worry.

—What do you need to say?—No person         smoke or carry a lighted cigarette in this special room.

I haven’t seen my old friends for years, I ‘m  looking  forword ______ them.