They find that dominant males are particularly 15 the “fake poop” that carries chemicals from females ready to mate.
答案：(A) responsive to
【句型】responsive to 字詞搭配「對……有反應」，表示優勢雄性對帶有雌性化學物質的假糞便特別「有反應」；annoyed at（對……生氣）、considerate of（體貼）、tolerant with（容忍）都不合。
這一題四個選項都是「形容詞＋介系詞」，你很容易只比對形容詞的意思，忽略介系詞對不對。這裡有一個關鍵：tolerant 的正確搭配是 tolerant of 或 tolerant towards（劍橋與牛津辭典皆如此收錄），沒有 tolerant with 這個用法——選項 (D) 從介系詞就已經錯了。看到形容詞＋介系詞的題目，先檢查介系詞，常常能直接刪掉一兩個選項。
空格前是 dominant males are particularly ___ the "fake poop"，後面直接接名詞，需要一個能帶介系詞受詞的形容詞片語。be responsive to sth 是「對……有反應、反應積極」。下一句 The males sniff it for longer duration and come back to the same spot more frequently 正是「有反應」的具體表現，語意完全吻合。
be annoyed at／with 是「對……生氣」，與後文「嗅聞更久、回來更頻繁」的積極反應相反；be considerate of 是「體貼、替人著想」，用在公犀牛對假糞便上語意不通。
be responsive to sth（對……有反應）、be tolerant of sth（容忍……）、be considerate of sb（體貼某人）、be annoyed at sth／with sb（對某事／某人生氣）、be particularly／highly responsive to（對……特別／高度有反應）。
From the campfire to the café, people have always gathered together to share the latest news. White rhinoceroses, 11 , do the same thing—only their choice of meeting place is a giant pile of poop. A new study indicates that rhinos have a smelly way to 12 .
Scientists studying white rhinos in South Africa have found that these animals leave messages in their poop. In particular, they leave their poop in the same place for all the other members in the group to smell—just like humans leaving messages on social media. Furthermore, different rhinos leave different chemicals in their poop, which provide important 13 about the age, sex, general health, and reproductive conditions of each specific rhino.
This is of great significance for the peace and harmony in the group. When all members in a group know what's going on with each other, it is 14 that they will fight.
The researchers have even made "fake poop" to see how different rhinos would react. They find that dominant males are particularly 15 the "fake poop" that carries chemicals from females ready to mate. The males sniff it for longer duration and come back to the same spot more frequently, a clear sign that they are gathering information about mating opportunities from the poop.