Раскройте скобки и употребите глагол-сказуемое в нужной форме (Past Simple, Past

Раскройте скобки и употребите глагол-сказуемое в подходящей форме (Past Simple, Past Continious, Past Perfect Active Voice). Предложения переведите.

1. I (to dream) when alarm-clock rang.
2. Whe the gate (to open) the crowd (to walk) in
3.When he (to start) telling the joke I realized that I (to hear) before
4. George didn't want to come to the movie with us because he already (to see) the film twice.
5. While I (to work) in the garden I heard a strange noise.