Помогите пожалуйста с английским : Choose the appropriate forms of the verbs to complete the sentences. 1) I left the classroom as soon as I (had written/had been writing) the test. 2) Andy came and said that they (had written/had been writing) their essays for an hour and a half. 3) My mother gave me her mobile because I (had lost/had been losing) mine. 4) George said he (had prepared/had been preparing) for his exam for a week. 5) After Jim (had paid/had been paying) for the books he left the shop. 6) I thought we (had waited/had been waiting) for Ann too long and decided to tell Andrew about it. 7) We (had swum/had been swimming) in the river for half an hour when Alfred said he was going to lie in the sun a bit. 8) After Lily (had packed/had been packing) her suitcase she headed for the car.

1. had written
2. had been writing
3. had lost
4. had been preparing
5. had paid
6. had been waiting
7. had been swimming
8. had packed