Past Continuous vs Simple Past

Complete each conversation by choosing the best alternative.
A: What during the rainstorm yesterday, Rita?
B: I a walk. So, when it started to rain, I under a tree to stay dry.

A: Where was Rita when it to rain?
B: She under a tree.

A: Why is Sarah's arm in a cast?
B: While she the snow from her front porch a few days ago,
     she on some ice and down. She her wrist.
A: That's too bad.

A: Why your phone when I last night?
B: What time ?
A: Around ten.
B: We . I the phone ring.

A: That was a terrible rainstorm yesterday! Where when it ?
B: I was inside the mall. I . I it was raining. How about you?
A: I was in the park. My friends and I soccer. We got drenched!