78. Every year, millions of people descend ____ protected and pristine natural areas to observe rare species.
A. on B. at C. in D. to
79. A number of reports have cast doubt ____ the value of ecotourism.
A. with B. about C. in D. on
80. It's hard to deny that humanity has played a pretty big role in changing nature ____ the worse.
A. with B. to C. for D. at
81. There will be some unforeseen consequences to the environment if we ____ ecotourism projects properly.
A. didn't manage B. don't manage C. couldn't manage D. wouldn't manage
82. If tourists win the trust of animals, they ____ put wild creatures in danger by encouraging them to relax with their natural predators.
A. will B. would C. could D. had
83. Ecotourism may become popular as people look for ways to get really close ____ exotic wildlife while keeping a clear conscience.
A. at B. in C. to D. with
84. Gorillas and penguins are among the species most susceptible ____ ecotourism because they have a strong tendency to relax in the presence of humans.
A. to B. in C. by D. with
85. As animals ____ to feeling comfortable with humans, they may become bolder.
A. will get used B. get used C. got used D. could get used
86. Professor Blumstein says that ecotourism is similar ____ domesticating or urbanizing the animals.
A. with B. as C. to D. like
87. Animals' regular interactions with people may lead ____ a kind of taming.
A. up B. in C. for D. to
88. Domesticated animals are less responsive ____ stimulated predatory attacks.
A. to B. with C. on D. at
89. Animals will take more time to flee from danger if they ____ in cities and are bolder.
A. will B. live C. would live D. could live
90. Ecotourism in distant and remote spots around the planet is getting more popular ____ tourists and tour guides.
A. to B. on C. with D. between
