Fill in the blanks with a/an, the where necessary.
1. Margaret is studying ______ Physics and _____ Chemistry this term.
2. It is pleasant to read ______ good book on ______ rainy days.
3. Please, give me _____ cup of coffee with ______ cream and ______ sugar.
4. Mother saw _____ accident this morning when _____ car crashed into _____ tree.