13.All of these ads__________ benefit the public, and you can often learn a lot by following the advice they give.(P4)

A.are meant to　　　 　　　 　　　 B.are intended to　　 　　　 C.are designed to　　 　　　 D.all of above

12.There are even PSAs __________us __________to live healthy lives.(P3)

A.to teach; how　　　 　　　 B.teach; what　 　　　 　　　 C.teaching; whether　　　 D.taught; however

11.These ads __________widespread social concerns, encourage people to support public service projects.(P3)

A.involving in　　　 　　　 　　　 B. dealing with　　　 　　　 D.which involved in　　　 D.which dealing with

10.You have probably seen or heard some of the PSAs yourself, __________, 'Yes to life, no to drugs' and 'Knowledge changes life'.(P3)

A.for example 　　　 　　　 B.such as 　　　 　　　 　　　 D.that is　 　　　 　　　 　　　 D.namely

9.__________PSAs to use educate people for many years, our government understands how important they are playing a role in our daily life.(P3)

A.Having been using　　 B.Used　　 　　　 　　　 　　　 C.Using　 　　　 　　　 　　　 D.Having used

8.PSAs ________us and help us lead better lives, _______commercial ads seek only profits.(P3)

A.aim to teach; while　　 　　　 　　　 　　　 　　　 　　　 B.are aimed to teach; but

C.are aimed at teaching; unless　　 　　　 　　　 　　　 D.aim at teaching; however

7.However, we still must be aware of the skillful methods __________in ads__________and sell us things.(P2)

A.used; to try　 　　　 　　　 B.using; trying　　　 　　　 C.to be used; trying　　　 　　　 D.that used; to try

6.There are laws_________people from advertisements_________cheat people.(P2)

A.protect; which　　 　　　　 　　　　 　　　　 　　　　 　　　　 　　　　 B.to protect; that　 　　　　

C.that to protect;/　　　　 　　　　 　　　　 　　　　 　　　　 　　　　 　　　　 D.which protecting; /

5.A commercial advertisement is __________which someone has paid for _________ a product or service.(P2)

A.one; to advertise for 　　　　 　　　　 　　　　 　　　　 　　　　 B.the one; to advertise

C.one; to advertise　　　　 　　　　 　　　　 　　　　 　　　　 　　　　 D.the one; to advertise for

4.An advertisement uses words and pictures to persuade people__________a product or service, or __________an idea.(P2）

A.to buying; believe　　　 　　　　 　　　　 　　　　 　　　　 　　　　 B.into buying; to believe

C.to buy; to believe in　 　　　　 　　　　 　　　　 　　　　 　　　　 D.into buying; believe in