Question

Quien me puede ayudar a poner estas frases de inglés en pasiva por fis!! <br />Merchants signed certificates promising to pay a certain amount of money..<br />European countries did not intoduce paper money until more than 500 years later. ​

Answer 1

Respuesta:

Certificates were signed by merchants promising to pay a certain amount of money

Paper money was not introduced by European countries until more than 500 years later.