A. The world's energy resources have taken many millions of years to produce, so we are quickly beginning to exhaust these supplies.
B. Although the world's energy resources have taken many millions of years to produce, we are quickly beginning to exhaust these supplies.
C. The world's energy resources have taken many millions of years to produce because we are quickly beginning to exhaust these supplies.
D. Since the world's energy resources have taken many millions of years to produce, we are quickly beginning to exhaust these supplies.
A. Recently UN committee reported that world's oil and gas supplies, will last about 100 years if they are used carefully.
B. Recently the UN committee reported that the world's oil and gas supplies would last about 100 years if using carefully.
C. Recently a UN committee reported that the world's oil and gas supplies would last about 100 years if used carefully.
D. Recently a UN committee reported that the world's oil and gas supplies would last about 100 years if it was used carefully.
A. The report stated that there would be enough oil and gas for a century only if the present demand could be controlled.
B. The report stated that there would be oil and gas enough for a century only if the present demand could be controlled.
C. The report stated that there were enough oil and. gas for a century only if the present demand could controlled.
D. The report stated that there will be enough oil and gas for the century only if the present demand can be controlled.
A. According to the report, governments must now take steps to control amounts of fossil fuels that are using.
B. According to the report, governments must now take steps to control the amounts of fossil fuels which used.
C. According to the report, governments must now take steps to control the amounts of fossil fuels that are used.
D. According to the report, governments must now take steps to control the amounts of fossil fuels that was used.
A. The foreman was powerful enough, but he was afraid of the workers.
B. The foreman wasn't powerful, so the workers didn't fear him.
C. The foreman was very powerful arid the workers feared him.
D. The foreman was strong enough: not to fear the workers.
A. He offered to give me a lift to the station.
B. He suggested taking me to the station.
C. He promised to give me a lift to the station.
D. He agreed to take me to the station.
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