_________ the help of man-made satellites, we can know what the weather will be like in the next few days.
——Could you tell me how to get to the Yellowstone National Park from here? ——_________. Maybe you can ask the policeman over there.
——Could I ask you a few questions? ——___________.
— I am going back to America for Thanksgiving Day. —_________. And we will miss you.
— Excuse me, could you tell me where I can buy some _________? — Sure. There’s a post office at the first crossing.
Our geography teacher said that the earth__________ around the sun.