Grammar 6 Complete the sentences with the past perfect and past simple form of the verbs in brackets.
1 (be) worried because 1 (not study) hard before the test. 2 Mum (not phone), so Dad (be) annoyed with her. 3 We (not buy) any tickets, so (not go) to the concert. 4 They (go) to London last year. They (not go) before 5 The pickpocket (run) away by the time the police (arrive). we​