问题
填空题
用所给词的适当形式填空。
1. I think the light bulb is the most useful _____ (invent).
2. Thomas Edison was a great _____ (invent).
3. The cup is used for _____ (warm) the cold wine.
4. The length of the rope is _____ (adjust).
答案
l. invention 2. inventor 3. warming 4. adjustable