chew the cud (of reflection)

The same question, asked 2 times: 25 Jul 2023 S1*, 17 Sep 2025 S1. Every wording below, oldest first.

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Question 1
25 Jul 2023 S1
81 $Select the correct idiom that can substitute the italicised group of words in the given sentence. Shelley has been contemplating for a few days but still has not decided to quit the job.$
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Question 2
17 Sep 2025 S1
79 $Choose the correct meaning of idiom: To chew the cud of reflection$
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