Pre-Test : Part C

When Charles Babbage,a professor of mathematics at Cambridge University, invented the first calculating machine in 1812 he Select Answer could have imagined hardly could hardly imagined could hardly have imagined the situation Select Answer - in what where we find ourselves in today. Nearly everything we do in Select Answer modern world the modern world the modern worlds is helped, or even controlled, by computers, the Select Answer complicate complicating complicated descendants of his simple machine. Computers Select Answer are being use will be being used are being used more and more extensively in the world today, for the simple reason that they are Select Answer very more far more most efficient than human beings. They have Select Answer much very quite a better memories and can store huge amounts of Select Answer informations, information, an information, and they can do calculations in a fraction of the time taken by a human mathematician. No man alive can do 500,000 sums Select Answer during while in one second, but an advanced computer can. In fact, computers can do many of the things we do, but faster and better. Select Answer Let's Let Lets look now at one of the ways Select Answer in which at which in whose computers concern people in their daily lives and Select Answer job. work. works.

Chief Inspector Harston talks about ways in which computers can help the police fight crime. Members of the public often think of detective work as fast and exciting when Select Answer the most of most of the much of it is slow and boring. For example, a detective on a stolen car case may have to Select Answer check up check in check through long lists of information, and in the time it takes him Select Answer to do for to do to doing this the thief may well escape. With the new National Police Computer we are now able to find out details of car ownership and driving licences in a fraction of the time it takes Select Answer in for by traditional methods. We Select Answer are also developing are also develop also developing systems of storing fingerprint information in computers and even information about Select Answer peoples people people's appearance. It's possible to work out codes for visual details and to link a computer with a videotape recorder. Then, instead of Select Answer looking up looking into looking through books of photographs Select Answer we'll be able to we'll be able we can to ask the computer to sort out the right ones, and see photographs of suspects Select Answer to flash flashing flashed across a VTR screen. In police work speed is often essential, so computers are ideal Select Answer to helping for helping for to help us catch criminals. The only problem is that we now have a new kind of criminal - the very clever man who knows Select Answer to how how to make huge sums of money by Select Answer cheating to cheat cheat a computer, and he is Select Answer too difficult indeed very difficult indeed so difficult indeed to catch.

Nobody's disagreed with the latest proposals, Select Answer have they ? did he ? has he ?
I'm next on the list to go out there, Select Answer are I ? aren't I ? am not I ?
So you think he'll be back before November, Select Answer will he ? shall he ? do you ?
You'd no idea it was going to be as hard as this, Select Answer did you ? hadn't you ? had you ?
It's been ages since we last saw him, Select Answer isn't it ? didn't we ? hasn't it ?
I don't believe you'd met before that, Select Answer had you ? hadn't you ? wouldn't you ?
He's due to arrive tomorrow, Select Answer won't he will he ? isn't he ?
You met him while you were on holiday, Select Answer weren't you ? didn't you ? haven't you ?
John's coming to see you, Select Answer isn't he ? wasn't he ? hasn't he ?
We'd better not stay up too late tonight, Select Answer didn't we ? had we ? have we ?