Please choose the correct ending to complete the given sentence: Education and Communications: [header] How to pronounce indubitably [title] Position your tongue and lips in a position so that you can create an " i " sound. [step] Your tongue will be close to the roof of your mouth, but there should be some space for the sound of the vowel to come through. [title] Bring your tongue to the roof of your mouth to create an " n " sound.

Ending1: [step] The sound you create will become a consonant. [title] Use your tongue to produce an " a " sound. Ending2: [title] Move the tip of your tongue to the roof of your mouth. [step] Force air through your mouth and curve your lips in a circle, thus making the sound " doo. Ending3: [step] This'll sound like a siack. A siack stands for " hitch " in spanish, or " narrowing " in the uk. Ending4: [step] Do this as if you were saying " boo! " without exerting any force. Think of the sound of " t " in your mouth, similar to how you say the word " tol.

Answer format: ending1/ending2/ending3/ending4