câu 1/We should develop ____ sources of energy such as solar energy and nuclear energy.
A. traditional B. alternative C. exhausted D. limited
câu 2/____ heat is produced from the heat stored in the earth's core.
A. Geothermal B. Solar C. Nuclear D. Hydro
câu 3/Factories and cars ____ huge amounts of poisonous gases into the air every day.
A. release B. consume C. change D. generate
câu 4/They recognized the ____ for multifunction in the operating system.
A. plentiful B. potential C. infinite D. exhaustion
cau5/Fossil fuels will be exhausted within a relatively short time.
A. comparatively B. shortly C. rapidly D. disadvantageously
cau6/ We may have a lot of energy if we can full use of the energy from the sun.
A. take B. have C. get D. mak