Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 19 to 24.

Lunar New Year, more commonly known by its shortened name Tet, (19) ______ is the most important and (20) ______ holiday and festival in Viet Nam. Tet takes place from (21) ______ first day of the first month of the Lunar calendar (around late January or early February) until at least the third day. Many Vietnamese (22) ______ for Tet by cooking special foods and cleaning the house. There are lots of customs practised during Tet, like visiting a person's house on the first day of the New Year, wishing New Year's greetings (23) ______ giving lucky money to children and elderly people. During Tet, Vietnamese visit their relatives and temples (24) ______ forget the trouble of the past year and hope for a better upcoming year.