.About 71% of the earth’s surface ______ covered with water, but 20% of the world population ______ have access to safe drinking water.
Out of the train_______, well-dressed and waving to the crowd.
The new method is indeed advanced and effective, quite different from _____ already in use.
—I am going to travel to England. Would you consider telling me about your experiences there? —__________.Let’s discuss it over drink.
China held a grand parade in Beijing to mark the defeat of Japan in World War Two, ________ its military power on an unprecedented scale.
They use computers to keep the traffic _________ smoothly.