A part of the sentence is underlined. Choose the alternative that best improves the underlined part. If no improvement is needed, select the option indicating no improvement. I had took the papers to John office.

Introduction / Context:

This sentence improvement problem tests your understanding of correct verb forms in the past perfect tense. The past perfect requires the auxiliary had followed by the past participle, not the simple past. Errors like had took are common in spoken English but are incorrect in standard written English, and examinations frequently test this point.

Given Data / Assumptions:

• Original sentence: I had took the papers to John office.
• The underlined part is had took the papers.
• Options: will took the papers, taken the papers, took the papers, no improvement.
• We assume that the speaker refers to an action completed before another past point.

Concept / Approach:

In English, the structure of past perfect tense is had plus past participle. The verb take has base form take, past form took, and past participle taken. The correct combination with had is had taken. When the auxiliary had is present, we must not use the simple past took. Therefore we look for the option that gives the correct past participle while still fitting into the larger sentence.

Step-by-Step Solution:

Verification / Alternative check:

Form the full corrected sentence: I had taken the papers to John office. This matches the pattern I had taken something, which is standard past perfect construction. You can test similar verbs such as write, wrote, written to confirm the rule: one would say I had written the letter, not I had wrote the letter. This comparison further confirms that taken is required after had.

Why Other Options Are Wrong:

Will took the papers is wrong because will is followed by the base form take, not the past form took.

Took the papers without had could form a different correct sentence I took the papers to John office, but that would require removing had, which is not allowed by the question.

No improvement is wrong because had took is a common but incorrect form that mixes auxiliary and past wrongly.

Common Pitfalls:

Learners sometimes confuse the simple past and past participle, especially with irregular verbs. Another pitfall is to try to correct the sentence by changing more than the underlined part, which the exam format does not permit. Always isolate the underlined words and fit the chosen alternative into that exact grammatical position.

Final Answer:

The underlined part should be changed to taken the papers, giving I had taken the papers to John office.