"En este momento" is the answer.
1. Yo conozco a Juan Alberto.
2. Ellos saben todos los detalles del cuento.
3. La clase sabe mucha información para el examen.
4. Tu madre conoce la ciudad de Paris.
5. María y yo conocemos todos los países en Sudamerica.
Did they give you a text or something for the question?
In railway signalling, an interlocking is an arrangement of signal apparatus that prevents conflicting movements through an arrangement of tracks such as junctions or crossings. The signalling appliances and tracks are sometimes collectively referred to as an interlocking plant. An interlocking is designed so that it is impossible to display a signal to proceed unless the route to be used is proven safe.
