I was tired that night , I ____wood all morning

Explanation:
Past Perfect Continuous Tense: The phrase "had been cutting" is in the past perfect continuous tense, which is used to describe an action that started in the past, continued for some time, and was still relevant at a later point in the past.
Context: The speaker mentions they were tired "that night" because of an activity ("cutting wood") that took place "all morning." The continuous tense emphasizes the ongoing nature of the task and explains why the speaker was tired.

Therefore, the correct option is:
4. had been cutting

Here’s a quick breakdown of why the other options don't fit:
1. was cutting: This is in the past continuous tense, which would be correct if describing an action ongoing at a specific point in the past, but it doesn’t fit the context of explaining why the speaker was tired.
2. cut: This simple past tense would indicate the action happened once in the past but doesn’t convey the ongoing nature of the activity.
3. had cut: This is in the past perfect tense, which indicates a completed action before another past action but doesn’t convey the continuity needed in this context.