El valor de las pruebas

La pista decisiva es «[1] _____ the unexpected results, the research team revised its explanation.». Usa having + past participle para expresar una acción terminada explícitamente antes del hecho principal. En esta tarea, la oración completa es «Having examined the unexpected results, the research team revised its explanation.».

La pista decisiva es «The original claim had been based [2] _____ a small group of volunteers.». La colocación es based on para una base o place emphasis on para un foco. En la frase completa, on introduce esa base o foco. En esta tarea, la oración completa es «The original claim had been based on a small group of volunteers.».

La pista decisiva es «Before recruiting a wider sample, the researchers [3] _____ that their survey excluded occasional users.». Usa had + past participle para expresar un hecho terminado antes de otro punto pasado. En esta tarea, la oración completa es «Before recruiting a wider sample, the researchers had realised that their survey excluded occasional users.».

La pista decisiva es «This raised questions about the [4] _____ of the findings to the whole population.». Entre the y of the findings/conclusions, se nombra una propiedad: applicability, el alcance de los resultados fuera de la muestra original. En esta tarea, la oración completa es «This raised questions about the applicability of the findings to the whole population.».

La pista decisiva es «[5] _____ all the initial reports were sincere, they could still form an unbalanced sample.». Usa although/even though + finite clause para expresar una concesión seguida de sujeto y verbo conjugado. En esta tarea, la oración completa es «Although all the initial reports were sincere, they could still form an unbalanced sample.».

La pista decisiva es «The team recommended [6] _____ the method in detail before repeating the trial.». Propose/recommend seguido directamente de una acción lleva aquí complemento -ing. El plan es la acción, no un tiempo finito ni un infinitivo con to insertado. En esta tarea, la oración completa es «The team recommended documenting the method in detail before repeating the trial.».

La pista decisiva es «They made a clear distinction [7] _____ an observed association and a demonstrated cause.». Make a distinction between A and B nombra dos conceptos cuya diferencia importa; between completa ese patrón de comparación. En esta tarea, la oración completa es «They made a clear distinction between an observed association and a demonstrated cause.».

La pista decisiva es «A colleague, [8] _____ objections had initially been dismissed, helped design the second study.». La relativa empieza con un nombre asociado al antecedente, como work, family u objections. Whose marca esa relación posesiva y el nombre siguiente permanece. En esta tarea, la oración completa es «A colleague, whose objections had initially been dismissed, helped design the second study.».

La pista decisiva es «Not until the new data had been checked [9] _____ the authors release their conclusions.». Usa only after/until + clause; inverted main clause para expresar inversión en la principal, no dentro de la subordinada con after o until. En esta tarea, la oración completa es «Not until the new data had been checked did the authors release their conclusions.».

La pista decisiva es «Had they ignored those objections, they [10] _____ a much stronger claim than the evidence justified.». Usa would have + past participle para expresar el resultado pasado irreal de una condición que no ocurrió. En esta tarea, la oración completa es «Had they ignored those objections, they would have made a much stronger claim than the evidence justified.».