Select the most appropriate word to fill in the blank and make a meaningful sentence.

She gave important evidence and I found her to be a sensible and ________ witness.

credible

The most appropriate word to fill in the blank is credible.

The word "credible" means "believable or trustworthy." This is the most appropriate word because it accurately describes how the witness was sensible and gave important evidence.

The other options are not as appropriate.

• Imposing means impressive or daunting. It does not make sense in the context of the sentence, because the witness is not imposing.
• Conclusive means providing final proof or settlement of a matter. It does not make sense in the context of the sentence, because the witness did not provide conclusive evidence.
• Unlikely means not likely to happen. It does not make sense in the context of the sentence, because the witness was likely to be credible.