Naturalresourcesarethings

问题详情：

Natural resources are things _____61_____ exist in nature and can be used by people. Some natural resources are renewable, like trees. When one tree is cut down, we can plant a new tree to replace it. Others, _____62_____, are not renewable, like the coal dug out of the ground. Once it is used, it is _____63_____. (go)

Although we all know that our natural resources are limited, we often waste them in our daily life. Paper, bottles and cans _____64_____ (throw) away carelessly; food is wasted just because of  its  poor  taste; clothes  are  rejected ____65_____ (simple) due  to  their  old fashion. These valuable natural resources will run out before long ____66_____ better use is made of them.

Actually, everyone can make contributions (贡献) to ____67_____ (protect) our natural resources. For example, _____68_____riding a bicycle or walking instead of driving, we can save lots of petrol. Water is a very important natural resource because we all need ____69_____ to stay alive. We can make wise_____70_____ (choose) to save water, like reusing the water that has been used to wash vegetables to water flowers.

【回答】

61. which / that                            62. however     63. gone                     

64. are thrown    65. simply  66. unless     67. protecting                    

68. by           69. it            70. choices

知识点：语法填空

题型：未分类