As practice makes perfect...

Here are some new exercises for you!

http://www.ego4u.com/en/cram-up/grammar/past-progressive/exercises?03

http://www.ego4u.com/en/cram-up/grammar/past-progressive/exercises?04

http://www.ego4u.com/en/cram-up/grammar/past-progressive/exercises?05

http://www.ego4u.com/en/cram-up/grammar/past-progressive/exercises

http://www.ego4u.com/en/cram-up/tests/past-progressive-1