问题 填空题
从方框中选择合适的单词,并用其适当形式填空。
invent, heat, operate, battery, bulb
1. I need to change the two ______in the camera.
2. The machine was ______by the old engineer in 1992.
3. Can you ______this machine?
4. Uncover the bottle when you ______the milk in the microwave on.
5. Edison invented the light ______.
答案

1. batteries    2. invented     3. operate    4. heat   5. bulb

单项选择题
单项选择题