Choose the right conjunctions to complete the sentences.

Choose the correct option.

I tried not to fail the exam, [and|or|but|so] the tasks were too hard!

Helen's friend baked a cherry pie, [and|or|but|so] they ate it together.

You can help me with cleaning, [and|or|but|so] you can do something else.

Leo wanted to travel to Spain, [and|or|but|so] he started to save up his pocket money.