Choose the correct words to fill the blanks: “While ______ in the garden, he ______ a small box.”

Correct answer: Digging, found. “While digging” introduces a past event, and “found” is the matching simple past verb.

• Digging, finding: “Finding” is not a finite verb, so the sentence has no main verb.
• Digging, is finding: “Is finding” is present continuous and does not match the past event.
• None of these: “None of these” is incorrect because the first option is correct.