[Grammar] choose

[nado92]

.I.......... three letters this afternoon.

wrote____ have written____ have been writing

I would choose' wrote' because the action is finished

 

[emsr2d2]

.I.......... three letters this afternoon.

wrote____ have written____ have been writing

I would choose' wrote' because the action is finished

I would say that, depending on context, all three are possible. If you have been told specifically that the action is finished, then "wrote" would be my first choice too, but "have written" would also be OK.