1. A. in B. at C. on D. from
2. A. is burning B. burned C. burning D. burn
3. A. to begin B. are beginning C. begin D. began
4. A. into B. of C. on D. with
5. A. to put B. putting C. puts D. put
6. A. teams B. pair C. group D. friends
7. A. helped B. helping C. help D. to help
8. A. brought A. bringing C. brings D. brought
9. A. part B. care C. caring D. note
10. A. received A. is receiving C. have received D. receiving