题目
People have been making_____1 of these natural supplies for thousands of years._____2 the development of technology and the increase of the population,the amount and range of materials.It is ____3 that this trend will continue in the years to come.However,natural resource are not____4.Some resources are already nearly used up.For example,the end of the world’s fuel is already within sight.Such an essential daily item as water is in short supply in many parts of the world.We can no longer thoughtlessly use many resources provided by nature.We must learn to conserve what ____5.
第2题
A.inadequate
B.insignificant
C.inexhaustible
D.invariable
第3题
A.appreciated
B.estimated
C.investigated
D.involved
第4题
A.estimating
B.estimated
C.estimates
D.having estimated
第5题
A.exploited
B.controversial
C.inexhaustible
D.remarkable
第6题
A.exploited
B.controversial
C.inexhaustible
D.remarkable
第7题
【C4】
A.calculated
B.estimated
C.expected
D.imagined
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