Respuesta:
1. Cell phones were produced for the first time in 1980s
2. My internet connection was stolen until I changed the password.
3. Medicine has cured people who were given the correct treatment!
4. Radios were not invented in the late 2000s.
5. Paper was created in China.
Explicación:
En la Voz Pasiva debemos tener en cuenta lo siguiente:
El Verbo to be se debe complementar con un Verbo en participio pasado.
La forma Negativa de la Pasiva se construye colocando Not después del verbo to Be.
Was - Complementa Sustantivos en Singular.
Were Complementa Sustantivos en Plural.
