<span>Many people in the United States celebrate Christmas Day on December 25. The day celebrates Jesus Christ's birth. It is often combined with customs from pre-Christian winter celebrations. Many people erect Christmas trees, decorate their homes, visit family or friends and exchange gifts.</span>
2. It's mine.
3. They're theirs.
4. It's his.
5. It's hers.
6. It's hers.
7. They're theirs.
8. It's ours.
9. It's his.
9. It's yours.
10. It's his.
11. Where is my keys?
12. ours.
1. fell, was painting
2. were walking, asked
3. was reading, heard
4. were watching
5. was having, rang
6. was waiting, arrived
7. was finishing, entered, was following
8. wasn't driving, happened
9. broke, was doing, slipped
10. was standing, heard
11. was taking, wasn't looking
12. were talking, ran
13. didn't go, was raining
14. wasn't listening, was speaking
15. what were you doing
16. saw, was wearing
1. Mustn`t
2.Must
3.must
4.mustn`t
5.mustn`t
6.must