Please choose the correct ending to complete the given sentence: Education and Communications: [header] How to cope with having a lisp [title] Notice if your tongue protrudes between your two front teeth. [step] This is called an interdental lisp. When you have this kind of lisp, you make the " th " sound for " s " and " z " sounds in words when you speak.

Ending1: Your tongue should protrude through both your front teeth. They should go from right under your top top gum to the gap between them, as if your tongue was hanging out behind your whole mouth. Ending2: Interdental lisps often occur in young children and can be corrected if caught early enough. [title] Check if your tongue touches your two front teeth. Ending3: This can happen while you are watching tv or having a drink. [substeps] This type of lisp appears to have a sharp " ch " sound when your tongue protrudes, as opposed to a flat one. Ending4: [title] Examine the bottom edge of your tongue. [step] At the base of each tooth, you might notice a smaller border.

Answer format: ending1/ending2/ending3/ending4