[单项选择]In 1845 Sarah Mather invented a submarine telescope that could be used to {{U}}locate{{/U}} and study underwater objects.
A. illuminate
B. raise
C. find
D. examine

When the steam engine was invented in the eighteenth century, it began one of the greatest revolutions that have ever happened in our world. The invention of the petrol engine at the end of the nineteenth century led to another enormous change in our lives. And the computer is almost certainly going to be no less important an invention than these engines were.
Just as there was a Stone Age, an Iron Age and so on, we have been living for centuries in a
Paper Age, during which almost all information was kept and sent on paper; and so much of it is wasted after it has been used once that enormous numbers of trees have to be cut down every year to provide us with paper. But now, with the computer, enormous amounts of information can be stored and sent without any paper at all, using small discs or the Internet.
Computers have also made it possible to do very difficult calculations very much faster than any earlier machine could. Computers also allow on
A. Handling information,
B. Doing office and business work.
C. Offering entertainment.
D. Making phone calls.