Here are the best answers to complete the sentences:

10. He is **A. doing**.
11. She is **D. playing**.
12. What my brother **D. plays** basketball with his friends three times a week.
13. She **A. does** a chat with her pen friend in American.
14. Helen rarely **B. has** a chat with her pen friend in American.
15. Frank is **A. studying** Maths at the moment to prepare for the final exam.
16. My brother doesn’t **A. play** badminton in the evening.

If you have any more questions, feel free to ask!