Let's practice the verb to be in the past?

http://suz.digitaleschulebayern.de/english/grammar/was_were1.htm

http://www.agendaweb.org/verbs/tobe-past-simple/index.html

https://www.ego4u.com/en/cram-up/grammar/simple-past/exercises?03

http://www.carmenlu.com/first/grammar/pastbe1_3.htm