It is an important meeting to elect our manager. (Added "an" before "important")
I think sugar is not good for your health. (Removed "the" before "sugar")
We will go to Ho Chi Minh City by plane. (Removed "a" before "plane")
It is a most beautiful beach in Vietnam. (Removed "the" before "most")
Most families in Vietnam prepare offerings at Tet. (Removed "the" before "Vietnam")
She bought two kilos of meat and half a kilo of tomatoes. (Changed "an half" to "half a")
It's a good idea to hand bowls with both hands. (Correct as is)
We are travelling to Spain in summer. (Removed "a" before "summer")
The boat race takes place in the morning. (Added "the" before "morning")
The rich are always true. (Added "the" before "rich")