Respuesta :
1. David and Carlos never clean their desks.
2. David and Carlos always clean their desks.
3. David and Carlos never clean their desks.
4. David and Carlos always clean their desks.
It would be the first and third, since they are both exactly the same.
2. David and Carlos always clean their desks.
3. David and Carlos never clean their desks.
4. David and Carlos always clean their desks.
It would be the first and third, since they are both exactly the same.