【简答题】完形填空。 The population problem may be the 1 , one of the world today. The world'spopulation 2 growing 3 . Two 34 years ago, there were only 250 million people 5 the earth. Four hundred years ago, 6...
【简答题】选词填空。 1. Sydney is our final ______ (destination, departure). 2. The ______ (world, world's) population was about 1,700 million at the beginning of the twentieth century. 3. There is nothing ______ (f...