Pregunta 44

Which sentences use put in to mean install something or invest time and effort? Select all that apply.

The engineer put the battery back after testing it.
An electrician put in an extra socket near the desk.Respuesta correcta
The relay team put in months of careful training.Respuesta correcta
The committee put forward a request for new equipment.

Explicación

The electrician installs a socket, and the runners invest many hours of training, so put in fits both actions. Returning a battery to its former position is putting it back, while proposing a request is putting it forward.

Explicación

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