Idiom: “as quiet as a mouse”
Meaning: Extremely quiet, a person that doesn’t talk too much
Veronica: Do you know Maria? She is my new student. I can’t make her say anything in class.
Elena: I know her. I had her in my conversation class last month. She is as quiet as a mouse.
Idiom: “it’s raining cats and dogs”
Meaning: It is raining very hard
Elena: Are you going to the bank today?
Veronica: Yes, I’m leaving in 5 minutes.
Elena: You’d better take your umbrella with you. It’s raining cats and dogs.
Idiom: “as sharp as a tack”
Meaning: An extremely smart person
Veronica: Have you met the new grammar teacher?
Elena: Yes, I’m so excited to work with him. He is as sharp as a tack.