問題詳情
【題組】34. According to the passage, why are ponds and wetlands good for cleaning streams?
(A) They act like filters.
(B) They enable the moose to have a better life.
(C) They can breed more plants than the land.
(D) They can keep the wolves away from the beavers.
參考答案
答案：A
難度：困難0.386
書單：沒有書單，新增