1.？ Bell Cat stepped forward and volunteered. Explanation: bell means bell, but here it is used as a verb to tie a bell to a cat.

This idiom comes from Aesop's fable and tells the story of a group of mice meeting to discuss how to deal with a fierce cat. A clever mouse suggested hanging a bell around the cat's neck so that the cat would make a sound when it passed by. Other mice think this suggestion is great, so who will hang the bell around the cat's neck? This is a desperate thing for all mice!

2.？ A cat on a hot tin roof and an ant on a hot pot. Explanation: The tin here refers to tinplate, and the "tin roof" is the roof made of tinplate. Imagine how hot it would be for a cat to walk on a tin roof in hot summer! You can imagine how nervous that cat should be.

This sentence vividly shows people's anxiety and tension, and it is also a very common idiom in life. For example, students are equally anxious when they are waiting for the teacher to announce their grades.

It's pouring down. Interpretation: Rain generally refers to rain or rain. It's raining cats and dogs. Is the picture a bit strange? But in fact, the meaning of this sentence has little to do with cats and dogs. This sentence means to express the feeling of very violent and pouring rain.

Legend has it that in ancient London, the drainage system was very simple. After a downpour, many lost cats and dogs drowned in the Wang Yang. So after the rain stopped, all the cats and dogs in the street died, just like falling from the sky, so the rain cats and dogs became synonymous with heavy rain.

But there is also a saying that the word comes from an old French word catadoupe, which means waterfall. Because the pronunciation of catadoupe in ancient French is somewhat similar to that of cats and dogs, it may be a derivative of phonetic conversion.