阅读理解。

     You can never be too sure these days in the United States of your neighbours or even your customers! Try to keep a low amount of attention from the public in your neighborhood: don't announce to just about

everyone that you are running a home business with thousands of dollars worth of equipment. As much as possible, don't invite customers or visitors to your home. In fact I know of some home-based businessmen who would rather meet their clients in a neutral ground, e.g. the client's office or even Starbucks.

     There are other ways to keep burglars away from your house.

     ●Keep lights on around your house in the evenings. Light is a natural fright for burglars.

     ●Invest in a security alarm, particularly if your house is located in a remote spot. Security systems can

often bring down the cost of your homeowner's insurance fees.

     ●Make sure that all windows and doors are locked and the security alarm turned on before you sleep

at night or go out of the house. Avoid keeping house keys in obvious places, such as under the lamp or

top of the doorframe.

     ●Adding an additional lock will provide extra security when you are home. The dead-lock, sometimes called an "exit-only deadbolt" is an deadbolt that doesn't have an external(外部的)key. It's clearly visible

on the door from the outside, but can't be broken into without destroying the door, frame, or lock itself.

While the security won't help directly when you aren't home, the visibility may discourage an intruder from

trying the door.

     ●Your door itself should be made of strong materials, such as one-inch thick solid hardwood or heavy metal.

1. The advice given by the writer in the passage focuses on __________.  

A. what to do when your house is broken into

B. how to make your house safer from burglars    

C. how to improve social security in the United States

D. how to run a home business

2. Some home-based entrepreneurs don't invite customers to their home _____.

A. to enjoy convenience outside their home

B. in order to avoid being seen by burglars

C. not to let others know their business

D. for reasons of their property safety

3. All of the following are part of the writer's advice except that the homeowner ________.

A. buy a security alarm and turn it on in the evening

B. keep lights on in all rooms to threaten burglars

C. have the doors made of solid hardwood or heavy metal

D. fix an extra lock on the door from inside

4. What does the underlined word "intruder" most probably mean in this passage?  

A. Someone who illegally enters the home.

B. Someone who is invited to visit.

C. Someone who pays regular visits to the home.

D. Someone who tries to destroy the lock.