Select the most appropriate option to fill in the blank.

The boys were tired, but not too tired to examine the little hut ______.

thoroughly

The most appropriate option to fill in the blank is thoroughly.

The sentence is about the boys who were tired but still examined the little hut thoroughly. The word "thoroughly" means in a complete and careful way. In this context, the speaker is saying that the boys examined the little hut in a very careful and detailed way, even though they were tired.

The other options are not as appropriate.

• Weirdly means in a strange or unusual way. This is not the most appropriate option because it does not describe the way the boys examined the little hut.
• Weakly means in a feeble or powerless way. This is not the most appropriate option because it does not describe the way the boys examined the little hut.
• Sluggishly means in a slow and lazy way. This is not the most appropriate option because it does not describe the way the boys examined the little hut.