15. Madagascar was one of the last habitable areas of the earth to undergo human settlement, which has made it an ideal site for researching rare flora and fauna. (A) Madagascar was one of the last habitable areas of the earth to undergo human settlement, which has made it (B) Madagascar was one of the last habitable areas of the earth to have undergone human settlement, and that has made it (C) Madagascar underwent human settlement as one of the last habitable areas of the earth, which makes it (D) Madagascar, one of the last habitable areas of the earth, underwent human settlement, making it (E) Because Madagascar was one of the last habitable areas of the earth to undergo human settlement, it is
the answer is E, why not A??
23. Of the twin supernovas, the most recently discovered is the largest, but it is the small one that has irrevocably altered astronomists’ ideas about the origins of the universe. (A) the most recently discovered is the largest, but it is the small one (B) the one most recently discovered is the largest, but it is the small one (C) the most recently discovered is larger, but it is the smaller (D) the more recently discovered one is the large one but the small one (E) the more recently discovered is the larger, but it is the smaller one
15. Madagascar was one of the last habitable areas of the earth to undergo human settlement, which has made it an ideal site for researching rare flora and fauna. (A) Madagascar was one of the last habitable areas of the earth to undergo human settlement, which has made it (B) Madagascar was one of the last habitable areas of the earth to have undergone human settlement, and that has made it (C) Madagascar underwent human settlement as one of the last habitable areas of the earth, which makes it (D) Madagascar, one of the last habitable areas of the earth, underwent human settlement, making it (E) Because Madagascar was one of the last habitable areas of the earth to undergo human settlement, it is
A,B,C,D错在make it an ideal site 的主语,都是Madagascar. 而一个地方不能主动make sth. 只有E 避免了这个错误,而且it指代Madagascar, 意思合适.E is the best choice.