Based on 4a, ex.3
Put the verbs in brackets in the past continuous.

Past Continuous

1. — What
   [ ] at 5:30 pm yesterday?

— They
[ ] dinner.
2. — What
[ ] last night at 7:00 pm?

— I
[ ] on the Internet with my friends.
3. —
[ ] at 8:00 am this morning?

    — No, she  

[ ] . She
[ ] a shower.

Sources:

Photo by rawpixel.com on Freepik, CC 0