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28………….. these clearly, for easy reuse.
Stack them in a special copying tray each morning.
29………….. codes which allow each user to access this tray.
Give highest users a 30………….. (e.g. cinema tickets).
Section 4
Questions 31-33
Choose the correct letter, A, B, or C.
31. Society cannot
A. find more coal and oil.
B. reduce waste C02.
C. take C02 from power stations.
32. Turning carbon dioxide
into a solid
A. is slow but practical.
B. can be made faster.
C. cannot happen naturally.
33. Seawater
A. has lots of carbonic acid.
B. has closely connected types of life.
C. is highly acidic.
Questions 34-40
Complete the table.
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Write
NO MORE THAN TWO WORDS OR A NUMBER
for each answer.
Three Problems of Geosequestration
Risk of leaks
Cost
3…………..still not proven
Gas would
become 35…………..
expensive, particularly
the 36…………..
Require the
plant to
burn 37………….. of its coal
risk of
widespread 38…………..
Price of
electricity
could 39…………..
release of more Sulphur, ash,
and 40…………..
