4 Complete the sentences with the correct form of the present perfect or past simple. 1 I've been to lots of countries. Last summer I ... (go) to Greece. 21... (pack) my suitcase last night. 3 She... (have) many adventures over the years. Last year she... (write) a book about them. 4 When... he... (come) back home? A week ago. 5 They... (plan) their trip very carefully. They would like to go next summer.​