Put the verbs in brackets into the correct form of the past perfect as in the example:
1. The students left the classroom because the bell
( ring )
2. Rik (not/finish) report by the time his boss returned.
3. After they (put up ) their tents, they made a fire
4. The fans were excited becaude their team ( win )
5. The burglars ( get away ) by the time the police arrived?
6. After Jane ( finish ) studying, she went out with some friends