a) They would have believed you if you hadn't lied to me before.
b) I would have got wet if it had rained.
c) If we had known you were coming, we would have baked a cake.
d) I would have been glad if you called me on my birthday.
Alternativa b) I would have got wet if it had rained, pois como a frase está no present perfect, o verbo após o "have" deve estar na forma da "terceira coluna", ou seja, o correto seria gotten
