A rocket burns propellant rapidly and most rockets carry a supply that last just

游客2024-11-15 7

问题 A rocket burns propellant rapidly and most rockets carry a supply that last just a few seconds.

选项

答案 last—lasts

解析译文：火箭迅速燃烧推进剂，而大多数的火箭携带的补充物仅能维持几秒而已。
分析：考查主谓数的一致。定语从句中，若关系代词在从句中作主语，则从句谓语的数应与先行词一致。本题中，先行词a supply为单数，故last也应用单数形式lasts。

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