Điền giới từ thích hợp cho trước vào ô trống
Before/under/out/between/of
Even before he is born, a baby has small teeth..........his gums.At about the age...........six months, he first tooth starts to grow. .............the young child is three years old, he has twenty small teeth. ..........the ages of six and twelve, a second set of teeth form in the gum below the first teeth and push them..........
Điền giới từ thích hợp cho trước vào ô trống
Before/under/out/between/of
Even before he is born, a baby has small teeth....under......his gums.At about the age.....of......six months, he first tooth starts to grow. .....Before........the young child is three years old, he has twenty small teeth. ....between......the ages of six and twelve, a second set of teeth form in the gum below the first teeth and push them.....out.....
Điền giới từ thích hợp cho trước vào ô trống
Before/under/out/between/of
Even before he is born, a baby has small teeth......UNDER....his gums.At about the age.....OF......six months, he first tooth starts to grow. ....BEFORE.........the young child is three years old, he has twenty small teeth. .....BETWEEN.....the ages of six and twelve, a second set of teeth form in the gum below the first teeth and push them.....OUT.....
