1.Heaters make us feel comfortable in  (summer, winter).

2.Printers make us work more  (efficient,efficiently).

3.On a dark night, when  (lightning, light)flashes, we can see electricity.

4.The  (wires, plugs)can carry electricity into our homes.

5.  (TV sets, Pollution)make our lives more enjoyable.

6. There're many  (electrical, electric)appliances in my home.