lest ... should, with no not after lest

This type of question, asked 2 times: 18 Sep 2024 S2, 18 Sep 2025 S3. All 2 questions below, oldest first.

Try each one first, then open its answer.

Question 1
18 Sep 2024 S2
82 $Select the most appropriate option to substitute the underlined segment in the given sentence. Rohan exercised and ate a lot, lest he should not be weak .$
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Question 2
18 Sep 2025 S3
91 $Choose the most suitable option to replace the highlighted part of the sentence: He worked very hard lest he may fail.$
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