Care must be taken in using this method lest overflow______.A、should occurB、occ

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问题 Care must be taken in using this method lest overflow______.

选项 A、should occur
B、occurs
C、occurred
D、will occur

答案 A

解析虚拟语气。以lest，for fear that和in case引导的状语从句中，谓语多使用should+V原形。

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