The engineers have used special methods to______the bridge against danger from high winds.

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问题 The engineers have used special methods to______the bridge against danger from high winds.

选项 A、suppress
B、lubricate
C、heave
D、ensure

答案D

解析 “suppress”意为“镇压,禁止”,“lubricate”意为“润滑,使顺畅”,“heave”意为“举起,使隆起”,“ensure”意为“确保,保证”。“ensure…against…”意为“保护……免遭……”,正符合题意,故正确答案为D。
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