We must take _______ measures to protect the natural environment, otherwise, one

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问题 We must take _______ measures to protect the natural environment, otherwise, one million species that are alive today will have become extinct.

选项 A、sharp
B、drastic
C、dramatic
D、sturdy

答案 B

解析本题测试形容词用法。四个形容词的意义分别是：A. sharp锋利的，尖利的；B．drastic激烈的，迅猛的。正符合题意。C．dramatic戏剧性的；D．sturdy强健的。句意为：我们必须采取断然措施保护自然环境，否则当前幸存的物种中有一百万种将会灭绝。

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