Mixed Prepositions Exercise 12

Complete the text below by choosing the correct prepositions, then press "Check" to check your answers.
The planet Mars, I scarcely need remind the reader, revolves about the sun a mean distance 140,000,000 miles, and the light and heat it receives the sun is barely half of that received this world. It must be, if the nebular hypothesis has any truth, older than our world; and long before this earth ceased to be molten, life its surface must have begun its course. The fact that it is scarcely one seventh the volume of the earth must have accelerated its cooling the temperature which life could begin. It has air and water and all that is necessary the support of animated existence.

An excerpt from "The War of the Worlds" by H. G. Wells
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