77. The author states that it is necessary for pet owners... A) to stimulate their pets in order to relive boredom
B) to form very close associations with their pets
C) to walk with their pets in the park or street as much as possible
D) to supply their pets with enriching surroundings
78. The former pet of the two mentioned in the text... A) needn't open space if there if there is proper atmosphere inside.
B) stays indoors at night so that they are in safety
C) really needs open spaces with lively areas nearby
D) may feel discomfort indoors as long as they are predate