Here are the missing words with arrows indicating where they should go:

1. English music was popular in America **in** ↑1960s.
**Missing word:** **in**

2. Would you prefer to read **a** ↑book or watch television?
**Missing word:** **a**

3. We had maths at school yesterday and our teacher gave us **a** ↑surprise test!
**Missing word:** **a**

4. Peter joined **the** ↑police and caught ten thieves in his first month!
**Missing word:** **the**

5. Gordon wanted to be **a** ↑writer, so he studied English at university.
**Missing word:** **a**

6. Suddenly, two UFOs appeared in **the** ↑sky over Washington.
**Missing word:** **the**