各位好，有幾個句子訂正的問題想請教：
1.Except for the phonograph, the accomplishments of distinguished
musicians and the voices of legendary individuals would have been forgotten
by history.
Except for 是錯誤的，請問是改成Except嗎?WHY?
2.Improvements in people’s health are due in part to advances in
medical care and better sanitary.
sanitary是錯誤的，請問該怎麼改?
3.Having been experienced many realistic disaster drills in his
training, Roberts handled the disaster calmly and effectively.
Having been experienced是錯誤的，請問該怎麼改?
4.Compared to those of animals, the fossil record for plants in quite sketchy.
those是錯誤的，請問該怎麼改?
謝謝大家的幫忙~^^