Answer: C) Past Continuous.
Explanation for this question is being written.
Answer: B) While they were walking home, it started to rain.
Answer: B) Was playing.
Answer: B) Was living; bought.
Answer: B) Were working.
Answer: B) Were you talking.
Answer: A) Was she.
Answer: B) Was playing/arrived.
Answer: A) Past progressive.
Answer: C) Was taking.
Answer: A) Was
Answer: D) Were flying.
Answer: D) Was setting.
Answer: B) Was having.
Answer: C) Was serving.
Answer: A) Were debugging.
Answer: B) Was studying; sent.
Answer: A) Was cooking.
Answer: B) While mother was cooking, father was reading the newspaper.
Answer: A) Was sitting.
Answer: A) Was-was
Answer: B) Was coming.
Answer: A) Were having.
Answer: A) Were you staying.
Answer: D) Past continuous.
Answer: C) Was listening, arrived.
Answer: C) Past progressive.
Answer: B) FALSE
Answer: D) He was watching TV when I called.
Answer: C) Arrived/ was having.
Answer: C) C
Answer: A) Were driving.
Answer: A) Past continuous tense.
Answer: A) Was becoming.
Answer: A) Were you doing.
Answer: C) Was preparing; came.
Answer: B) Was baking.
Answer: C) Was studying.
Answer: B) Was looking.
Answer: C) Were walking.
Answer: B) Was running.
Answer: A) Were
Answer: D) Couldn't learn I wasn't listening.
Answer: B) They were going to the park.
Answer: D) Was barking.
Answer: D) Was studying.
Answer: B) The students were studying English seriously.
Answer: A) Was taking.
Answer: A) Was/Were + subject + verb(-ing)?
Answer: D) Was / studying / called.
Answer: B) Was raining.
Answer: D) Was watering.
Answer: D) Was cooking, was listening.
Answer: D) D
Answer: A) Was looking / saw.
Answer: B) Was eating.
Answer: B) She was cooking when I arrived.
Answer: C) Were