1. You should knock the door before you enter the office. (nên)

2. You shouldn't eat a lot of fast food because it is not good for your health. (không nên)

3. In Viet Nam, people shouldn't break things at Tet because they believe it will bring bad luck for the rest of the year. (bởi vì, tại vì)

4. Temples in Japan ring their bells 108 times to celebrate the New Year. (gõ)

5. It is a tradition in America to exchange a midnight kiss with someone they love. (truyền thống)

6. Tet is really a time of family and festivals throughout the country. (gia đình)

7. Nowadays the Tet holiday is much shorter, but people enjoy the festival very much. (hơn)