Complete the sentences with the present simple or past simple passive form of the verbs in the box.
(sell, clean, send, steal, produce)
1. The painting _____ for $ 7 million in 1998.
2. Our office ______ every night.
3. A lot of pollution ______ by aeroplanes.
4. Millions of emails ______ every hour.
5. Jack's bike _______ last week.