单选题 .  Gallaudet University currently does not allow students to keep pets in their dorm rooms     21        are made only for service animals such as guide dogs and hearing dogs. These     22    dogs provide services that benefit their student owners. But other kinds of pets can be     23    to students too. Pets should be allowed to live in the dorms because they can help students     24    stress and learn responsibility.
    College life is very     25    and students often feel a lot of pressure and     26    . Pets could help students relieve     27    in many ways. For example, playing with pets could give students a study break. Walking a dog or playing with a cat would allow the students to relax their body and     28    . When the students return to their studying, they would feel     29    and ready to work again. Pets could also relieve social stress or homesickness. A dog or cat could provide     30    and affection when students have problems with their friends or     31    home.
    Sometimes it is easier to talk to a pet than to a person. Talking about problems helps students figure out     32    . Pets would have a positive influence on the stress of college life. College is also a time when students need to learn to be responsible.     33    pets could help students learn responsibility in several ways.     34    , pets need to be fed and watered on a regular schedule. Some pets also need to be taken out     35    others need their litter box or cage cleaned. Students would learn to schedule time for these     36    between their classes and activities. New students     37    having their parents do things for them. But parents do not live     38    college campuses with their children. Therefore, caring for a pet is something students would have to do     39    . They would learn how to solve problems on their own and how to follow through with their commitments. Having pets would teach students to     40    more adult responsibilities.21.