It was common practice to first test and execute a program's source code by hand before using a computer.
It was common practice to first test and to execute a program's source code by hand before using a computer.
The first version of the sentence is without a second to, the second version includes a second to. Which one is correct?
executegreen suggesting to useexecutesinstead which doesn't make any sense to me. (my mother tongue is German) – marc wellman Dec 19 '12 at 2:19