Which sentence is correct as far as tense is concerned?

-A recent survey reveals that that only one in four people under 30 can change a plug themselves.

- A recent survey has revealed that ..............................................................................

-A recent survey revealed that ........................................................................; 

 

 

 

I �d go for "A recent survey has revealed... (present perfect).

 

Present simple is not an option because the survey must be ready by now, so it was made in the past (and I don �t think the historical present applies to statistics - timeframe is very important in statistics).
Regarding the verb tenses that refer to the past, I think that present continuous is a better option than past simple, because the sentence directs us to a non-specified time in the past ("recent"); past simple would be adequate if you had any specific time ("last month", for instance).

Sandra

All three are correct.

 

Bruce 

I agree with Bruce.

Hi Bruce (Couldn �t find a waving hand)

Lynne