<span>1. b) have you been working
2. a) had changed
3. b) has created
4. b) have been producing
5. b) has had
6. a) have you been doing
7. c) has increased
8. c) had been typing
</span>
AAÀAAAAAAAAAAAAAAAAAAAAAAA
1. Isn't she?
2. Hasn't he?
3. Isn't she?
4. Don't they?
5. Can't you?
6. Hasn't he?
Read, cook (lunch), take, buy, Cook (lunch), take, buy, wash, stop, listen, see, answer.