单项选择题
“重阴必阳”的理论依据是（）
A．阴阳交感 B．阴阳对立制约 C．阴阳转化 D．阴阳互根互用 E．阴阳消长
单项选择题 Sadly, the Giant Panda is one of the many species now in danger of（）
单项选择题 The detective and his assistant have begun to （）the mysterious murder.
单项选择题 The wood was so rotten that, when we pulled, it （）into fragments.
