Cách sử dụng
To "draw a blank" means that you are unable to remember something, answer a question or come up with an idea. It's usually used when you're trying to think of something, but you can't. For example, if someone asked you what the capital of France is and you couldn't remember, you can say "I'm drawing a blank." It's a way of saying that you don't know the answer, but you're trying to remember it.