Grammar 3 Complete the sentences with the correct form of the verbs in brackets. Use the Past Simple or Past Continuous.

0 I was (be) born in 1999.
1 (you / read) books about space exploration when you were a boy?
2 My grandparents (not / watch) TV when aunt Helen visited them.
3 Last week I (buy) a new mobile phone.
4 (John / sleep) at seven o’clock yesterday?
5 Professor Thatcher (work) at university when he had a brilliant idea.