Question

use as blind as a bat and as clean as a whistle in sentence​

Answer 1

When someone having a faulty vision, we can allude it as blind as a bat. Talking about its origin it comes in the class of idioms derived from animals. This is a figure of speech that based on the assumption that bats cannot see properly.

Before the 21st century, people used to believe that bats are blind because of their meandering flight pattern. However, in reality, they use to navigate long distances through a process called echolocation. This assumption about bats later developed as an idiom with different meanings and today it's used in the context of someone who has terrible eyesight or someone who can’t see even an obvious thing.

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Answer 2

Will is so in love, he is as blind as a bat when it comes to Kate's rude behavior.

This house is as clean as a whistle.