[問題]OG156 請問as~as結構的省略問題

[souljuice]

og156
Dirt roads may evoke the bucolic simplicity of another century, but financially strained townships point out that dirt roads cost twice as much to maintain as paved roads do.
上面是加了正確答案後的全文,請問一下,最後面這個do可否省略,我覺得dirt road跟paved road的動詞都是cost,省略應該不會有歧意?感謝!
Sorry@@版主拜託幫我刪掉!!我沒有問題了,感謝!!