Are there any books, on your shelf?
<span>1. It’s possible that they don’t live here any longer. a They mightn’t live here any longer.
2. It isn’t possible that they are twins. b They can’t be twins.
3. It could be that they are not married. a They mightn’t be married.
4. It isn’t possible that there is some milk in the fridge. a There can’t be any milk left.
5. I think I saw her go out. a She mightn’t be at home.</span>
27. 1 was blowing, was snowing
2. were eating and drinking
3. didn't take
4. was waiting
5. was refusing but watching
6. had
7. were preparing
8. went
9. was raining
10. got, rang
11. were walking
12. felt
13. became
14. was
15. opened, came
28. 1. returnes, will be able, 2. would 3. would 4. will 5. will be held 6. arrives 7. will tell you 8. would 9. recovered, should 10. am
9. 2. would come 3. would return 4. would say 5. would join 6. would do 7. would fly 8. would discover 9. would accompany 10. would sell
10. 2. will 3. would 4. will 5. would 6. would 7. will