When were wild-animal acts introduced?
A.In the 18th century.
B.In the first half of the 19th century.
C.In the second half of the 19th century.
D.Early in the 20th century.
正确答案是B
When were wild-animal acts introduced?
A.In the 18th century.
B.In the first half of the 19th century.
C.In the second half of the 19th century.
D.Early in the 20th century.
正确答案是B