評論
打印
24. In the 18th and early 19th centuries, passenger pigeons____.
A. were the biggest bird in the world
B. lived mainly in the south of America
C. did great harm to the natural environment
D. were the largest bird population in the Us
25. The underlined word "undoing" probably refers to the pigeons' ____.
A. escape
B. ruin
C. liberation
D. evolution
26. What was the main reason for people to kill passenger pigeons?
A. To seek pleasure.
B. To save other birds.
C. To make money.
D. To protect crops.
27. What can we infer about the law passed in Michigan?
A. It was ignored by the public.
B. It was declared too late.
C. It was unfair.
D. It was strict.
