题目内容：

How to clean the keyboard

 

Turn off your laptop before you do any cleaning. Even though you won’t be putting water directly onto your laptop, you should turn off the power to make sure nothing gets damaged if a little moisture does get inside.

 

 

Turn the laptop upside down and gently tap or shake it. This will remove big pieces of dirt, crumps (碎屑) or other debris (碎片) that’s hiding in your keyboard.

Tip:  It may help to spread a towel under the laptop before you shake it, to make cleanup easier.

 

 

Spay between the keys with compressed air to remove dust. The air of the force will blow the dust that’s trapped between and under the keys.

 

 

Remove dirt with a cotton ball and alcohol (酒精). Alcohol evaporates (蒸发)quickly, making it a safe alternative to using water on your laptop. Alcohol is especially good at removing the dirt left by your fingers. In addition, alcohol is good at removing germs (细菌).

 

1.To remove big pieces of dust in our keyboard, we can ________.

A.put the keyboard under the tap and wash it

B.shake the laptop hard until the dirt falls out

C.turn the laptop upside down and gently shake it

D.remove the dirt with a cotton ball and alcohol

2.Using alcohol is safer than using water on keyboard because ________.

A.alcohol can remove germs B.alcohol can disappear faster when it is used

C.alcohol can protect our fingers D.alcohol is good for cleaning oil

3.Which of the following is NOT mentioned in the steps?

A.What should we do before cleaning.

B.How to remove big pieces of dirt.

C.How to remove the dust between the keys.

D.How should we clean the screen.