Помогите плиз. Underline the correct verb tense​

Question

Помогите плиз. Underline the correct verb tense​

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Answer 1

1 Susan was walking home when it started to rain.

2 Helen was cooking while Tom was working in the garden.

3 I was sleeping when my friend Joe came to my house.

4 Who were you waiting for when I saw you?

Answer 2

1. was walking .... started
2. was cooking .... was working
3. was sleeping ... came
4. were you waiting ... saw