Sure, here are the options filled in:

Some people really prefer to live in the downtown (36) ______ its facilities. But I prefer to live in the countryside because of many reasons.

First of all, the life in the city makes me uncomfortable. I cannot bear to live in cramped conditions with the hustles and bustles. We do not have fresh air to (37) ______, do not have a space for our children to play and for us to relax. It is really tiring and upset to wait for hours because of traffic jams.

Secondly, the pollution because of smog and dusts and noise can make me feel (38) ______. Moreover, I do not feel safe to live in the city because the criminal situations are rising. We feel worried (39) ______ we go out each time.

36. A. because of
B. despite
C. although
D. because

37. A. breath
B. breathe
C. breathing
D. breathes

38. A. happy
B. sad
C. relaxed
D. stressed

39. A. when
B. while
C. until
D. although

So the correct answers are:

36. A. because of
37. B. breathe
38. D. stressed
39. A. when