Read the excerpt from "The Revolt of Mother.”The boy combed assiduously."Sammy!”He turned, and showed a face like his father's under his smooth crest of hair. "Yes, I s'pose I did,” he said, reluctantly.

In this context, “I s’pose I did” means “I guess I did” or “I suppose I did.” The boy is reluctantly admitting that he combed his hair, so “guess” is the closest meaning. “Recall,” “know,” and “hope” do not fit the meaning of the phrase here.

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