1. I’m looking forward to ...................you at Christmas. (see/ seen/ seeing)
2. Litter boys like ................... trees. (climb/ climbing/ have climbed)
3. Mr. Ha decided ...................... his new suit .(wearing/ to wear/ wear)
4. Some people are used to ............... in crowded buses. (standing/ stand/ stood ) 5. I dislike ........................... on the subway. (to ride/ riding/ ride )
6. I enjoy ................... with Miss Phuong. (to study/ studying / studied )
7. Students must practice .................................the computer.(to use/ using / use ) 8. Hoa and Lan have stopped ..........to each other. (to talk/ talking/ talks)