Ex. 12. Express the idea in (a) Past, (b) Future

1. Computer-controlled robots must increase the productivity of industry.

2. To solve scientific problems, researchers must deal with the language of science – mathematics.

3. She should change the plug on her hairdryer.

4. The telephone company must increase its workforce by 10 percent.

5. We must delete something else to install the new software.

6. He should look for the information on the Internet.

7. At many companies, employees should attend classes in order to become computer literate.

8. The engineers must make major improvements on this device to do the experiment successfully.

Ex. 13. Using modal verbs (must, should) and their equivalents (to be to, to have to), give some recommendations for taking care of software stored on disks or tapes. Use the information below and your background knowledge.

Model: Before opening disks, scan them for viruses.

You are to scan disks for viruses before opening them.

1. Handle disks carefully.

2. Never touch their recording surfaces.

3. Never bend disks.

4. Keep disks and tapes away from magnetic fields, e.g. the top of a monitor.

5. Do not expose them to damp, extreme temperatures or dust.

6. Keep disks in envelopes, cassettes in cases.

7. Use a felt tip pen to write on disk labels.

8. Use good quality tapes, of a suitable length.

9. Make back-up copies of programs on disks or tapes.

10. Store disks in a suitable, secure place.