第二节(共5小题;每小题1分,满分5分)(2025·江苏苏州高新区实验初级中学调研)
阅读下面短文,从短文后的选项中选出可以填入空白处的最佳选项。选项中有两项为多余选项。
16 
G
 He filled it with seeds(种子) and put it in his backyard and then birds started coming. 17 
C
 Then he joined a local(当地的) club. As he realized that more and more birds were dying very quickly, he wanted to try his best to help them.
18 
F
 He does research about birds, runs a website to teach people about birds and how to help them, and builds boxes for birds. Not long ago, he found that bluebirds were nesting(筑巢) in the dead trees which were often cut down, so he began to make boxes for the birds. 19 
D
 He hangs them up in trees and takes them down every week to see if the birds are nesting in them. He also writes articles, hoping that more people will join him in protecting natural ecosystems(生态系统). “Researching birds is important,” Jack says. “ 20 
E
 ”
A. Now dead trees are fewer and fewer.
B. There are more and more birds flying away.
C. He got really interested in birds as more came.
D. Now he wants to use these boxes to take the place of(取代) dead trees.
E. In order to protect birds, we have to learn and really know about birds.
F. Besides what he has done, he has his own group called Protecting Our Birds.
G. Jack’s love for birds started when he made his first bird feeder(喂鸟器) six years ago.
16. ______ 17. ______ 18. ______ 19. ______ 20. ______