But in that case when avanture beginswith a vowel why not cet instead of cette

Hi Harsha,

ce -- the pronoun to use with male nouns starting with a consonant.
cet --for male nouns starting with a vowel.
cette -- for female nouns.

L'aventure is a female noun, so you need to use cette.

-- Chris (not a native speaker).

Hi Chris, you say "ce -- the pronoun ..."

Should 'ce' be a 'demonstrative adjective' (and not a pronoun) as discussed in this lesson?

Thanks Stewart

Yes, I guess the correct term is demonstrative adjective. -- Chris.