[单项选择]Scientists have discovered in the past few years that ______.


A. the exposure of DNA to the public is unnecessary
B. the tiny cell in DNA is a neat little machine
C. man actually knows nothing about DNA
D. man has much to learn about DNA

[单项选择]Now scientists have found in the past few years______.
A. the exposure of DNA to the public is unnecessary
B. the tiny cell in DNA is a neat little machine
C. man knows nothing about DNA
D. man has much to learn about DNA

[单项选择]Scientists discovered that people's emotions are______.
A. controlled by their facial expression
B. influenced by their facial expression
C. identical with their facial expression
D. contrary to their facial expression

[单项选择]Scientists have discovered a close （） between smoking and several serious diseases.
A. action
B. connection
C. union
D. combination

[单项选择]The past few decades in Birmingham have proved that slum clearance ______.
A. will usually take longer than expected
B. creates as many problems as it solves
C. often raises racial issues
D. always achieves its aims, if well planned

[单项选择]Over the past few years, first radio, and now television, have shown the ______ public, who are after all the electorate, what in fact ______ when government bills are discussed and questions are asked.
A. average; turns up
B. ordinary; comes up
C. general; goes on
D. normal; lets on

[单项选择]For the past few years Susan had been _______ her income by the creation of fiction under a pen name.
A. extending
B. magnifying
C. exceeding
D. supplementing

[单项选择]In the past few years the school has _____ a lot of money improving the teaching equipment.
A. cost
B. paid
C. spent
D. taken

[单项选择]

Text 1
The past 40 years have witnessed an extraordinary evolution. From slow expensive machines controlled by punched cards, computers have become low-cost, powerful units taking up no more space than a briefcase. Simultaneously, our world has become interlaced with telephone wires, optic fibers, undersea cables, microwave links, television channels and satellite communications.
At the crossing of these two developments stands the Internet—a direct result of computer technology intersecting with communication technology. But for many in the world of today’s media, this is merely a first landmark in what promises to be a giant upheaval in the way people communicate, relax and work. This is the era of digital convergence.
According to a recent article in Scientific American, convergence is in principle "the union of audio, video and data communications into a single source, received on a single device, delivered by a single connectio
A. revolution.
B. communication.
C. integration.
D. transmission.