Read the passage and choose the best answer for each question

I. Read the passage and choose the best answer for each question
Viet Nam’s New Year is celebrated according to the Lunar calendar. It is officially known as Tet Nguyen Dan, or Tet. It begins at the end of January or early February. The exact date changes from year to year. Vietnamese people usually make preparations for the holiday several weeks beforehand. They tidy their houses, cook special food, clean and make offering on the family altars. On the New Year’s Eve, people sit up to midnight to see the New Year in, and then they put on new clothes and give one another the greeting of the season. Tet lasts ten days. The first three days are the most important. Vietnamese people believe that how people act during those days will influence the whole year. As a result, they make every effort to avoid arguments and smile as much as possible.
1. When does Tet begin?
A. At the end of January or early February   B.  Early January or at the end of February
C. In early February                                     D. At the end of February
2. What do Vietnamese people usually do to prepare for Tet?
A. Tidy the houses and cook special food                        B. Buy fireworks
C. Clean and make offering on the family altars               D. A and C are correct
3. How long does Tet last?
A. Three days          B. A week               C. Ten days             D. Many days
4. Why are the first three days the most important?
A. Because they make every effort to avoid arguments and smile as much as possible.
B. Because they put on new clothes on these days
C. Because Vietnamese people believe that how people act during those days will influence the whole year.
D. Because they give one another the greeting of the season.