I often see Tom on the playground. When I passed the playground yesterday, I saw him . A. play; playing B. to play; play C. playing; to play C. playing; play
I need lots of money to ------ for my education.
Li Ming gave me a ticket-------a film.
It’s difficult-------- me to learn English well.
This machine was used -------years ago.
If I have a big house, I will------- a pet dog.