The utilization of hydroelectric resources should be stepped up.A、sustainedB、in

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问题 The utilization of hydroelectric resources should be stepped up.

选项 A、sustained
B、increased
C、supported
D、encouraged

答案 B

解析 increase“逐渐增加，提高”，与划线词同义。A项sustain“维持，支撑”；C项support“支持”；D项encourage“鼓励”。

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