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7. Not a single scientist shall work on problems whose solution may
be a threat to mankind.
8. An individual scientist may not be highly moral. Scientific com-
munity as a whole ought to be.
9. Science ought to be right in the long run, if not in the short.
10. Good ideas should be written down before they are forgotten.
11. They should have used a stronger solution.
12. To be a great scientist one need not solve a great many problems.
13. A scientist may freely choose his line of research.
14 This may or may not be the shortest, or even a straight, line.
15. Everyone might be granted the right to be occasionally wrong.
16. Most people can question the uncertain, only few can question
the obvious.
17. It is commonly believed that science is omnipotent, that it could
solve any problem.
18. Man would ever ask questions.
2. Complete the sentences with need to, must, need, don’t have
to, mustn’t, has to, can, have not been able to. Use the verbs below.
use cutting cut order read
complete mop change empting seen
1. You’ll need to mop the floor – there’s been a spillage.
2. You ______________ gloves after contact with each patient.
3. The bins _____________ – they’re all full.
4. You _________________ Mr Mill’s nails – I’ve just done them.
5. You _________________ your mobile phone inside the building.
6. The Ward Sister ________________ a hygiene report every
month.
7. My hair _______________ – I can’t keep it all under my hat.
8. I ________________ some more paper towels – they’ve nearly
all gone.
9. _______ you ________ well enough to get around the house?
10. For how long _________ you ___________________ a newspa-
per?