Compound Sentences

What coordinating conjunction should be used to combine the following sentences? "Julie did not go to school. She was ill."

What coordinating conjunction should be used to combine the following sentences? "The store didn't have shirts in my size. The store didn't have any shoes in my size."

What coordinating conjunction should be used to combine the following sentences? "The weather was cold. We decided to go for a hike anyway."

What coordinating conjunction should be used to combine the following sentences? "She worked tirelessly on her project. She couldn't meet the deadline."

What coordinating conjunction should be used to combine the following sentences? "The recipe called for fresh herbs. I went to the garden to gather them before cooking."

What coordinating conjunction should be used to combine the following sentences? "The sun was shining brightly. The children played happily in the park."

What coordinating conjunction should be used to combine the following sentences? "You can choose the red dress. You can go with the blue one for the party."