题目内容
Which sentence should be put at the first of the paragraph on the right?
________ Water and soil help provide us with necessary' food and drinks. Coal, oil and natural gas are not only useful for families, but have wider use for factories.
A.Our environment is changing for the worse.
B.People depend on natural resources to live.
C.People have many ways to protect the environment.
D.Some natural resources will run out if we use them carelessly.
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