What does the author say about mass audiences?
A.They have gone out of business
B.They have little influence on communications in the 20th century
C.They have shifted their attention from magazines to television.
D.They get information about gardening and psychology from radio

The boy did his homework ___________ .
A.by himself
B.his own self
C.on himself
D.by his own.

A: “May I use your car for a few days?” B: “_ ”
A.It’s up to you
B.Not at all
C.You’re welcome
D.Welcome you.

Preparing for a job interview can be very .
A.stress
B.stressful
C.stressed
D.stressing

This knife is very blunt. It needs ___________ .
A.sharpeningly
B.sharpen
C.sharpening
D.sharply

This road , ., is narrow and winding
A.which the two villages are joined
B.which the two villages are joining
C.which joins the two villages
D.joins the two villages

They were exposed to biased information, so they didn't know the true story.
A.If they got unbiased information, they could know the true story.
B.If they had been exposed to unbiased information, they would have known the true story.
C.If they had unbiased the information, they could have known the true story.
D.If they have exposed to the unbiased information, they could have seen the true story.

The student next to me kept chewing gum. That bothered me a lot.
A.The student next to me kept chewing gum, that bothered me a lot.
B.The student next to me kept chewing gum bothering me a lot.
C.The student next to me kept chewing gum bothered me a lot.
D.The student next to me kept chewing gum, which bothered me a lot.

He was suspected to have stolen credit cards. The police have investigated him for days.
A.Suspecting to have stolen credit cards, he has been investigated for days.
B.Suspected to have stolen credit cards, he has been investigated for days.
C.Having suspected to have stolen credit cards, he has been investigated for days.
D.He has been investigated for days, suspected to have stolen credit cards.

The switch was too high for him to reach.
A.He wasn't tall enough to reach the switch
B.He wasn't enough tall to reach the switch
C.He wasn't tall enough for reaching the switch
D.He wasn't so tall that he can reach the switch.