Trees are a renewable resource that when managed properly can ______our needs indefinitely.

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问题 Trees are a renewable resource that when managed properly can ______our needs indefinitely.

选项 A、sustain
B、retain
C、maintain
D、obtain

答案A

解析 近形近义题。由indefinitely可知是在时间上无限地满足我们的需要,sustain“维持,支持”指连续不断地支持、提供某物,符合句意,所以[A]为答案。[B]retain“保持”着重指继续保持,特别强调保持不失去某物或不为他人所夺去;[C]maintain“维持,保持”指保持某种状态,强调坚定性;[D]obtain“获得,得到”。
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