“On no account to feed the animals,” the warning can be seen on the signboard on front of every cage (笼子).
A. allow visitors
B. are visitors allowed
C. visitors are allowed
D. are allowed visitors
网友回答
A. allow visitors
(答案→)B. are visitors allowed
C. visitors are allowed
D. are allowed visitors
解析：可联系答.案.网客服索取。