Read the text below and answer questions 27 to 30 Attention to all visitors. Here we are tell you about the rules in this zoo. First, don't feed the animal. Second, keep the cleanliness in this zoo. And third, keep off from a vicious animal. We don't want our visitors to be hurt by the animal in our zoo. Thanks for your attention. Zoo Management, 27. Why does the management of the zoo write this kind of textA. To forbid the visitors from feeding the animals.
B. To inform the rules of the zoo to the visitors.
C. To describe the vicious animals to the visitors.
D. To invite the visitors to come to the zoo.
28. We have to keep off the vicious animals in order to ...
A. avoid the visitors from being hurt by them
B. make the animals feel comfortable
C, let the visitors interact with the animals freely
D. observe the animals in a very secure atmosphere
29. "..we don't want our visitors to be hurt the animal in our zoo." The word "we" in the sentence refers to ...
A. the zoo management
B. the owner of the zoo
C. the animals trainer
D. the director of the zoo
30. "...keep off from a vicious animal." The underlined word means....
A. dangerous
B. tame
C. wild
D. pet​

27. B
28. A
29. A
30. A (vicious = buas)