The little baby is cute. How old is it?
這個小寶寶很可愛。他/她幾歲?
the = this / that
這個/那個
How old is he?
他幾歲?
How old is she?
她幾歲?
I have no idea.
= I don't know.
我不知道。
The little baby is cute. How old is it?
這個小寶寶很可愛。他/她幾歲?
I have no idea. Maybe it's only one month old.
我不知道。也許他/她是一個月大。
I have no idea. Maybe it's only two months old.
我不知道。也許他/她是兩個月大。