根据句子意思填写单词,使句子合理、通顺
1._______ is the fourth day of the week.
2.When you post a letter,you should go to the _______ ________.
3.Is there a _______ ________ in the neighborhood?I want to make a telephone call.
4.________ Day is on June 1st.
5.My mother is a _______.She helps _____to look after sick in the hospital.