—I hate cities . The roads are dirty and they are always crowded.—Do you know the world’s

问题补充：

—I hate cities . The roads are dirty and they are always crowded.

—Do you know the world’s population has grown to？

more than six times what it was in 1800

six times more as what it was in 1800

more than six times large as it was in 1800

D. more than six times as large as in 1800

答案：

解析：考查倍数问题。这里的倍数结构为：倍数 + what + 主语 + 谓语，more than修饰倍数，放在倍数之前，选A。