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Query Results: Challenging.a (page 139)

5,099 results in the active KB.

An aerobic workout can be challenging.
Logical form
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4 sentences.
(Essay dissertation writing) can be challenging.
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4 sentences.
Hours can be challenging.
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4 sentences.
Church can be challenging.
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4 sentences.
Friends can be challenging.
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4 sentences.
Readers can be challenging.
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4 sentences.
A net can be challenging.
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4 sentences.
An (online riddle game) can be challenging.
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4 sentences.
Kids can be challenging.
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4 sentences.
A relationship can be challenging.
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4 sentences.
A lot can be challenging.
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4 sentences.
Cities can be challenging.
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4 sentences.
A (scavenger hunt) can be challenging.
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4 sentences.
Looks can be challenging.
Logical form
Learned from
4 sentences.
Principles can be challenging.
Logical form
Learned from
4 sentences.

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Results returned on 2026-09-10.