问题补充:
There is hardly an environment on earth some species of animals or other have not adapted successfully.
A. in which
B. on which
C. to which
D. for which
答案:
A. in which
B. on which
(答案→)C. to which
D. for which
解析:关系代词which代指先行词environment,介词to和动词adapt构成adapt to“适应”。
【标签】介词+关系代词