Shanghai is the first city in the world ____a high-speed maglev train, from the city to Pudong Airport.
The vegetables in his field ________ well, because they are pollutionfree.
—What's the matter with Philips?—Something must have happened to him. He left home three hours ago, but ________ at the party!
If this product does not give you complete satisfaction, please return it to the manufacturer, stating when it ________.
—David, are you listening to me?—Sorry, Dad. I ________ to make sense of what the reporter said.
—Look! Someone ________ the floor.—Well, it wasn't me. I went shopping just now.