... being…(22) They may seem unwilling to talk about their work in school There is a normal development…(23) this age, though it can be very hard for parents to xxx It is xxx of becoming… (24) of teenagers ... the Middle East (Trung Đông), bread (bánh mỳ) is the main part of every meal Eating, like so many things we do, becomes a habit ( thói quen), which is difficult to change Americans like to drink ... they have always eaten, and there is very little we can change our eating habits 31 the writer thinks that… A people eat only what is normal to everybody B people offen change their feelings...