Complete the sentences. Use the past perfect and past simple in each sentence.

1.Alexander the Great__________(create) an empire by the time he________(be) 25.
2.I_______(want) to call you, but Mark________(not give me your number
3.We______(not get) her a present before we______(go) to her birthday party
4.My mum______(get) her driving licence after we_______(buy) a new car​