____ with what the students had done, the teacher praised them highly. [ ]

A. Delight

B. Delighting

C. Delighted

D. Being delighting

肾下垂常见的原因有()

A．重体力劳动

B．女性、消瘦、营养不良

C．腹部肿块

D．腹壁松弛

E．从事久站久立职业