问题详情：
根据句意，用括号内所给单词的适当形式填空。
1. A glass is used for ________(drink) water.
2. What is the most (use) invention in the world?
3. Do you know the (heat) ice cream scoop?
kind of bicycle was (invent) by a middle school student.
do you think of these (invent)?
【回答】
1. drinking 2. useful 3. heated 4. invented 5. inventions
知识点：构词法
题型：完成句子
