| 4.- c) | There is still ________ work to be done ________ researchers in this area. |
| RESPUESTAS PROPUESTAS: |
| Hay una serie de respuestas evidentes: |
| There is still much work to be done by researchers in this area. There is still lots of work to be done by researchers in this area. There is still a lot of work to be done by researchers in this area. |
| Pero la oración también se presta a otras soluciones: |
| There is still much work to be done , say researchers in this area. There is still lots of work to be done , say researchers in this area. There is still a lot of work to be done , say researchers in this area. |

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