Joey gets 100 marks on her exam. ______________, she feels excited.
Therefore
I was sad ______________ I dropped the ice cream on the floor.
because
It was rainy. _________, we stayed at home.
Therefore
I had a stomache _____________ I ate too many hamburgers.
because
Candy will not be able to play with her friends _____________ she finishes her homework.
unless
I cannot hear you _____________ it is too noisy.
because
I will not do well at school __________ I study for my exams.
unless