There is hardly an environment on earth
题型：选择题
问题：
There is hardly an environment on earth ______ some species of animal or other have not adapted successfully.
A．to which
B．in which
C．for which
D．on which
There is hardly an environment on earth ______ some species of animal or other have not adapted successfully.
A．to which
B．in which
C．for which
D．on which