【C19】A．advancingB．developedC．matureD．settled

【C17】A．proposedB．developedC．suppliedD．offered

【C10】A．advancingB．liftingC．raisingD．enhancing

【C20】A．improvedB．developedC．worsenedD．impaired

mature 选择能代替的选项A、completedB、prematureC、deliberateD、purified

【C9】A．developingB．developedC．developD．developments

【C8】A．proposedB．developedC．suppliedD．offered