Question

oraciones de contaminacion en pasado simple en ingles

Answer 1

Respuesta:

Ground water contamination, toxicity levels, that kind of thing

WHO, in collaboration with UNICEF, monitors levels of water contamination.

In addition to harm to humans, water pollution seriously damages the ecosystem.

As a result, there was some concern about water contamination.

Explicación:

Answer 2

Respuesta:

When we (arrive) in the town, we realised that all  

By the time the book (come out), they already (make) a film about the mystery.

The police (catch) the murderer after he (hide) the murder weapon.

No one (see) this man until he (appear) on the beach one day

Explicación:

espero te alla ayudado :D