問１ The decline of wolves in Yellowstone National Park in the early 1900s resulted in ( ) .
1 a decrease in the number of hunters, which was good for the wolves
2 a decrease in the number of ranchers, which reduced the human population
3 an increase in the number of elk, which damaged the local ecosystem
4 an increase in the number of trees and plants, which helped elk to hide
問 2 Out of the following four graphs, which illustrates the situation the best?
問 3 According to the article, which two of the following tell us about the current situation in the park?
（Choose two options.
The order does not matter.）
1 More travelers are visiting the park than thirty years ago.
2 One species was saved but another has become extinct instead.
3 People have started hunting wolves around this area again.
4 The park has both wolves and elk, as well as rich vegetation.
5 There is a new rule to reduce the elk population in the park.
問 4 The best title for this article is ( ) .
1 A Decrease in the Number of Ranchers’ Animals
2 Addressing Problems With Nature’s Balance
3 Nature Conservation Around the World
4 Releasing Elk in National Parks
平成30年度試行調査 英語リーディング 第６問Ｂ