A rhyming couplet in iambic pentameter is "double, double, toil an trouble".
<h3>What is a couplet?</h3>
It should be noted that a couplet simply means a successive part of the lines of a verse hat are typically of same length.
In this case, the rhyming couplet in iambic pentameter is illustrated above.
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using the image of darkness to imply that something bad will happen
Answer:
No
Explanation:
Holmes is challenging them to attempt something bad, so he can stop them
