1)“La rectoría” is singular so we can eliminate the answers with dan and damos.
So, the choices are da un paseo or da a. If we wanted to walk in a place or to a place we would need sometype of movement marker such as “a” or “por.” In this case da un paseo would be odd because there is no marker.
2) “Los hombres” is plural, so we can eliminate the answers excepts for dan de comer a, dan la mano, or damos las gracias a. “We (nosotros)” is not a part of los hombres either so we eliminate answers with damos as well. Also, it is odd to end a sentence with a… since it would be incomplete. So, we can eliminate dan de comer a… and damos las gracias a…
3) This is a little tricky. However, we have the word “nos” ha dado which indicates “we (nosotros)” so we should look for an answer with the word damos.
4) “Los misioneros” is plural. So, we can eliminate answers that start with da. That leaves us with dan de comer a… or dan la mano and we already used dan la mano.
5) Tomás is singular, so can eliminate most of the answers except da un paseo or da a.
*If in doubt, it can be helpful to check whether the first, second, or third person singular or plural are being used*