19. We dinner when you called round. 1)weren't having
2)didn't have
3)didn't be having

1) weren't having

Объяснение:

The correct sentence would be: "We weren't having dinner when you called round." This indicates that the action of having dinner was in progress at the time of the phone call.

It will be 1 cause others are wrong
2 is wrong for not having “to”
3 is wrong for same reasons as 2 and there shouldn’t be “be”