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means that they will not 1 forever. Some are renewable, like when you plant a new tree when you 2 one down. Others are not renewable, like when you dig coal(煤) out of the 3 . Once it is used, it is gone. People realize the 4 that Earth’ s natural resources are limited, and can do things to help Conserve(節(jié)約) those resources. 5 you try to conserve a natural resource, you try to use less of it, so it does not get used up so 6 . One way that people conserve fuel, like gasoline, is by riding a bicycle or walking when the 7 is sh ort instead of driving everywhere. Water is a very important natural resource because we all need it to stay 8 . We can conserve water 9 _ making sure that our pipes and taps do not leak(漏) . We can also make 10__ choices to conserve water, like only using the dishwasher or washing machine when they are can make contributions to protecting natural resources. 1. A. last B. spread C. burn D. change 2. A. turn B. cut C. put D. move 3. A. station B. building C. ground D. brick 4. A. news B. plan C. decision D. fact 5. A. When B. Although C. Whatever D. Whether 6. A. slowly B. hard C. regularly D. fast 7. A. money B. space C. place D. distance 8. A. alive B. alone C. asleep