I ___ (study) when the phone ___ (ring).

• was studying / rang

• studied / rings

• is studying / rang

• was studying / rings

While she ___ (read), her brother ___ (play) outside.

• was reading / was playing

• read / played

• is reading / plays

• was reading / played

They ___ (not understand) the teacher when he ___ (explain) the lesson.

• A. didn't understand / was explaining

• don't understand / explains

• didn't understand / explained

• weren't understanding / explained

We ___ (have) dinner when the power ___ (go) out.

• were having / went

• had / went

• have / goes

• were having / goes

While I ___ (do) my homework, my sister ___ (watch) TV.

• did / watched

• was doing / was watching

• was doing / watched

• do / watches

He ___ (study) for his test when I ___ (call) him.

• was studying / called

• studied / called

• is studying / calls

• was studying / was calling

They ___ (arrive) at the airport while we ___ (wait).

• arrived / were waiting

• arrived / waited

• are arriving / were waiting

• arrived / are waiting

The kids ___ (play) in the yard when their parents ___ (come) home.

• played / came

• were playing / came

• were playing / were coming

• are playing / came

I ___ (see) him at the party last night, but I ___ (not speak) to him.

• saw / didn't speak

• was seeing / didn't speak

• saw / wasn't speaking

• was seeing / wasn't speaking

She ___ (write) a letter when her pen ___ (break).

• • was writing / broke

• wrote / broke

• was writing / was breaking

• writes / broke