问题
选择题
Some experts think the wolf's team spirit for survival is ________ is needed in today's competitive society.[ ]
A. that
B. what
C. which
D. how
答案
答案：B
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Some experts think the wolf's team spirit for survival is ________ is needed in today's competitive society.[ ]
A. that
B. what
C. which
D. how
答案：B