- 1. Mother (watch) was watching TV when he arrived.
- 2. Tom (play) was playing computer games at 9 pm yesterday.
- 3. Bob and Mark ( read) were reading magazines when their father came.
- 4. She (send) was sending e-mails until 10 pm last night.
Ответ: 1. was watching, 2. was playing, 3. were reading, 4. was sending