Water plants: condicionais mistas (B2)
Water hyacinth is the clearest example of a plant punished for doing exactly what it is good at. Native to the Amazon basin, it absorbs nutrients from water at extraordinary speed, which is why nineteenth-century collectors carried it around the world as an ornamental, and why sanitary engineers later built it into treatment ponds. In warm nutrient-rich water outside its natural range, and without the insects that control it at home, the same efficiency turns it into a mat thick enough to stop boats, block turbines and suffocate the life below. If the species were not such a formidable purifier, engineers ___ it into those systems in the first place, and dozens of tropical reservoirs would be cheaper to manage today.
Fonte: English for ALL (texto original).
Assinale a alternativa que completa corretamente a lacuna do texto.
- A) would never introduce
- B) will never have introduced
- C) had never introduced
- D) would never be introducing
- E) would never have introduced