IV. Fill in the blanks with suitable prepositions.
1. Tet is a festival which occurs ________ late January or early February.
2. New Year’s Day is ________ January 1st.
3. Family members who live apart try to be together ________ Tet.
4. Auld Lang Syne is sung ________ New Year’s Eve.
5. I congratulate Susan ________ passing her exam.