Đáp án:
Exercise 6:
1. I'd been working
2. I'd not looking
3. she'd been dealing
4. I'd been waiting
5. I'd been reading
Exercise 7:
1. had been watching
2. had played - hadn't won
3. had been walking - had walked
4. had stopped - was smoking
5. had been aching
6. was lying - had bought - had been reading
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Chúc bạn học tốt =))
-Minhh-