the weather was so lovely that we spent the whole day in the garden
=>It was such lovely weather that we spent the whole day in the garden.
I don't have a car , that's why can't pick you up tomorrow
=>If I had a car, I could pick you up tomorrow.
my class watched a film yesterday . The film was about the Apollo 13 space mission
=> The film (which / that) the class watched yesterday was about the Apollo 13 spacemission.

1. It was such lovely weather that we spent the whole day in the garden.
2. If I had a car, I could pick you up tomorrow.
3.  The film that the class watched yesterday was about the Apollo 13 space mission.