Mathematics problems can be classified into different category systems based on their complexity levels. - 连词成句练习3题（含答案） - 英语句子重组训练 - 正正题库
连词成句练习3题（含答案），包含"Mathematics problems can be classified into different category systems based on their complexity levels."、"The hiking instructor demonstrated how to properly calibrate the compass before embarking on mountain trails."等3个句子。通过打乱的英语单词重新排列组成正确句子，提高英语语法和句型理解能力。每隔一个单词预置，支持打印练习。