Get a good lock.There are many different types in the shops.Buy one that has been tested against attack.Ask for a recommendation from a bike shop.

Marking

Security marking your bike can act as a deterrent to a thief. It can also help the police find your bicycle.It should be clearly written and include your postcode and your house or flat number.This will provide a simple way to identify your bicycle.

Registration

There are a number of security companies who will help mark your bicycle for you.They will then put your registration number and personal details on their computer database.Then if your bicycle is found it will be easy to contact you.

Finally

Keep a record of the bicycle yourself:its maker,model and registration number.You can even take a photograph of it.This will prove the bicycle belongs to you.

21 .Which part of the text gives you information on how to lock up your bicycle when you leave it?

A.Basic Security B.Marking. C.Registration. D..Locks.

22. The underlined phrase"act as a deterrent to a thief"means ________.

A.help you recognize your bike

B.help the police find your bicycle

C.stop you worrying about your bike

D stop someone stealing your bicycle

23. The article advises you to keep a record of your bicycle ________.

A.in the bike shop and your computer

B..by yourself and in a security company

C.in a security company and your university

D in the police station and a security company

B

When many people are worried that there are no more heroes in the modem society, two university students who lost their lives to rescue drowning children have shown that heroes still exist.