At the turn of the twentieth century, forest covering as much as 90 percent of Thailand and accommodating as many as 300,000 alaphants, a third of them domesticated and performing various essential tasks.

(A)covering as much as 90 percent of Thailand and accommodating as many as 300,000 alaphants, a third of them

(D)covered as much as 90 percent of Thailand and accommodated as many as 300,000 e;ephants, a third of them

答案是(D)

想请问为什么不是A

谢谢

还是不太清楚with的用法~~

哪位NN能讲讲c~~