Martha .......... (to play) tennis while John .......... (to read) a book.
- was playing / was reading
- played / read
- played / was reading
- was playing / read
📝 Detailed explanation
The word while shows two actions happening at the same time in the past. For simultaneous actions in the past we use Past Continuous.Structure:
was/were + verb + ing
Correct sentence: Martha was playing tennis while John was reading a book.