Question

Lonely汪

4.不確定

詩光-

the most common birds in the world. They lived in flocks    4    billions 01

birdS. When they migrated, flocks of passenger pigeons sounded “5 _thundei

aS they flapped their wingS. This species disappeared a century ago- 症 passenger
pigeons are brought back, “6   全 they will Still be able to live in their old

habitats. jm addition,    交    1t is Tight to bring back extinct animals is Still an

issue for debate. After all, there are many endangered species that need our help

Therefore, some people have proposed that we should 8 the extinct species

引one and save the endangered animals first。

VWVCVGL

lak

 全IC HSUC:

Dusedto be

Answer 1

Jung

我覺得是D
他應該是要考關代
which當代名詞指前面的flocks
如果用making的話要用分詞構句的形式
前面要加，
然後從文意看會太冗（前後是一樣意思）
所以應該是用關代的方式去補充說明前面的flocks比較合理