我必须给你看看我刚买的这本新书。

I must ___show you this new book I've just bought.

你应该把那个皮疹给你的医生看看。

You ought to ___show that rash to your doctor.

你为什么不给我看看你手里有什么？

Why won't you ___show me what you've got in your hand?