Answer:
1) Fran was tired, so she couldn't walk another step.
2) It was such a beautiful day, I decided to go hiking in the mountains.
3) There was such heavy rain, we were worried about flooding.
Step-by-step explanation:
1) in brackets added to sentence. (so)
2) same as 1 (such)
3) same as 2 (such)
HOPE IT HELPS!