As a rule of thumb, a manned mission costs from fifty to a hundred times more than a comparable unmanned mission. Thus, for scientific exploration alone, …(1)… missions, employing machine intelligence, are …(2)… However,... Read more

Which of phrases given below each sentence should replace the phrase printed in bold type to make the grammatically correct? If the sentence is correct as it is, mark ‘E’ as the answer. 1. The crime has growth rapidly in Russia since... Read more