精选优质文档-倾情为你奉上英语语法之形容词比较级和最高级练习题1. This box is_ that one.A. heavy than B. so heavy than C. heavier as D. as heavy as2 When we speak to people, we should be _ .A. as polite as possible B. as polite as possiblyC. as politely as possible D. as politely as possibly3 This book is_ that one, but_ than that one.A. as difficult as; expensive B. as more difficult as; more expensiveC. as difficult as; more expensive D. more difficult as; as ex