answer the given sentence using the past progressive aspect of the verb.
1. my brother and sister ___ playing tennis yesterday.
a. are b. was c. were
2. they___ television when I arrived.
a. were watching b. were watched c. watched
3. at 9pm last night,___ you still working.
a. were b. are c. was
4. at 8:30 today, I ___ driving to work.
a. was b. am c. were
5. snow___ lightly, suddenly a reindeer appeared.
a. fell b. was falling c. is falling​