IX. Complete the words in the following sentences by adding the prefix inter-, intra-, trans-, com-, con-, up- or down-.

1. Last month computer __time cost the company over €lO,OOO in lost production.

2. The computers in the production department have now been successfully __connected with those in the planning department.

3. Once you have completed payment details the data will be __mitted via a secure link.

4. We cannot network these computers because the systems are not __patible.

5. Many companies distribute internal documents on their own __net.

6. Once the home page has been completed, we'll be ready to __load the site.

7. Cables are being laid throughout the building as the network requires physical __nections.

X. Complete the sentences with the verbs in the appropriate tenses.

1. Early in the 20th century, an American scientist, Robert H. Goddard, _____ (conduct) practical experiments in rocketry. He ____ (become) interested in a way of achieving higher altitudes than were possible for lighter-than-air balloons.

2. The growth in communications services over the past fifty years ____ (be) phenomenal. A satellite named Telstar I ____ (launch) in 1962 to relay TV signals between Europe and the United States.

3. Currently, most of the communication systems ____ (replace) by fiber optic cables which provide extremely high bandwidth and ____ (make) possible the transmission of a wide variety of information sources.

4. Today we ____ (witness) a significant growth in the introduction and use of personal communications services. Satellite and fiber optic networks ____ (provide) high-speed communication services around the world.

5. Airplane tickets are expensive. If they ____ (be) cheap, I ____ (fly) to London for the weekend.

6. One way of viewing nanotechnology is that if one ____ (be) to continuously downscale the size of man-made structures one would eventually be limited by the building blocks of matter - atoms and molecules.

7. He said that flight simulators ____ (make) a major contribution to aviation safety.

8. The technician ____ (apply) for that job if he had lived anywhere near the plant.

9. Last month the passengers ____ (complained) that they ____(had been waiting) for over two hours. The Airline Company ____ (informed) the passengers that they needed to put some of them on a later flight.

10. More and more people ____ (do) their shopping on the Internet. Even so, the number of Internet companies that fail ____ (remain) very high.

XI. There are 22 words in this grid dealing with Information Technology. Can you find them all? (Look down and across.)

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