using dictionaries is u-------- to learn new words,wo we should have a dictionary everyone------------是u开头的单词的一部分

问题描述:

using dictionaries is u-------- to learn new words,wo we should have a dictionary everyone
------------是u开头的单词的一部分

Using dictionaries is (useful,有用的) to learn new words.
使用字典对学生词是有用的.