Choose the correct form of the verb.
1. She … Nick before they met at school.
a) didn't see b) wasn't seeing c) hadn't seen
2. When my dad came home, the children … the lunch.
a) ate b) were eating c) had eaten
1. The letter … some minutes after she had left.
a) came b) was coming c) had come
2. While they … the road the car crash happened.
a) crossed b) were crossing c) had crossed