The Earth's population has ________since the turn of the century
The population increases in geometrical progression and has crossed the 5 billion mark. The united nations estimate an average growth rate of 1.5% per annum.
The shortest air route from Moscow to San Francisco is
The world's largest river is the......
...................is called the "land of a thousand lakes"
Which is the fourth planet from the sun ?
Which of the following cities is not one of the capitals of South Africa ?