helpful 等品质形容词认读 — 英语填空题
题目
给下面的句子选择合适的单词填空（每个词限用一次），并写出其中文意思。helpful / clever / quiet / naughty
1. Liu Tao often helps his grandma carry things. He is ___.
2. Mingming can answer all the hard questions. He is ___.
3. Don't be ___ in class. Please sit down and listen to the teacher.
helpful 的中文意思是：___