[单项选择]It was not until 1920 （　） regular radio broadcast began.
A. that
B. while
C. which
D. since

[单项选择]It was not until 1920（　）regular radio broadcast began.
A. that
B. while
C. which
D. since

[单项选择]It was not until 1920______regular radio broadcasts began.
A. which
B. when
C. that
D. what

[单项选择]It was not until 1920（）regular radio broadcasts began.
A. while
B. which
C. that
D. since

[单项选择]It was not until 1920 ______ regular radio broadcasts began.


A. when
B. which
C. that
D. since

[单项选择]The plane（）radio signals for help until site crashed.
A. gave out
B. went out
C. handed over
D. ran out of

[简答题]a regular port

[单项选择]Cox Radio, one of the nation's largest radio chains, plans to ______ its ties with independent record promoters to distance itself from a payola-like practice that runs rampant in the music business.
A. consolidate
B. tout
C. sever
D. splash

[单项选择]President Carter's major contribution to broadcast news was that he ______.

[单项选择]They gave （） broadcast while the performance was in process on the stage．
A. live
B. living
C. lively
D. alive

[单项选择]According to the passage, how many major broadcast networks are there


A. Two.
B. Three.
C. Four.
D. Five.

[单项选择]Firms hold regular sales conferences because they can _______.


A. exchange information about the business.
B. receive higher education.
C. travel around the world.
D. take the opportunities to stay together with their colleagues.

[填空题]

Eufracio Tolentino:
I did regular exercise when I was young, but by my 30s, I had a family and a busy job. I neglected exercise for years. At 59, I had a stroke that resulted from lack of exercise. Now I visit a recovering center in the morning and spend my afternoons exercising. I encourage my friends a start exercising. If they don’t, engaging too much in their work or family, they may also suffer from a stroke.
Raymond Chiew:
Think you’re healthy just because you’re within your ideal weight range for your height Wrong! Take me as an example. I figured I got enough exercise playing tennis once a week, for I wasn’t overweight and didn’t smoke or drink. Then at 57, I woke up one early morning with chest pains and tests revealed that I had serious heart trouble. I was shocked. Now I walk for an hour every day and my doctor says that my heart is improving.
Dr Santos-Ringor:
Whether you hire a personal trainer, ta