[单项选择]There is one aspect that most characterizes the Midwest--its broad, flat Great Plains that______ far into the horizon.


A. slide
B. stray
C. stroll
D. stretch

[单项选择]There is one aspect that most characterizes the Midwest--its broad, flat Great Plains that______ far into the horizon.
A. slide
B. stray
C. stroll
D. stretch

[单项选择]

One important aspect of retirement for most people is deciding where to live. In the past, this was not an issue because most elderly persons remained at home where they could be close to family. In contemporary times, parents and grown children go their separate ways, staying in touch through the telephone and, more recently, through e-mail. Every year, more than 400,000 adults who are 55 or older move out of their home state and relocate.
Florida leads all states in the proportion of elderly people-19 percent over 65 years of age, most of whom relocated from other places. Thus, Florida cities have become known as retirement centers. Among those prominently mentioned are Boca Raton, Daytona Beach, Fort Lauderdale, Fort Myers, Naples, and Ocala where between 20 and 25 percent of the residents is over 65 years of age. Two other Florida cities, Saint Petersburg and Sarasota, have even higher proportions-25 percent and 32 percent respectively. Other cities that have gained r
A. Retirement centers.
B. Retirement sites.
C. Retirement state.
D. Retirement communities.

[单项选择]From the information given in the passage, most minerals would melt fastest _____________.


A. at 4,000°F, 5,000 feet below sea level
B. in the absence of oxygen
C. at 4,000°F, 5,000 feet above sea level
D. at the exact center of the earth at 4,000°F

[单项选择]He said the most unusual aspect of the Mexican trial was that the 12 teenagers were not given any drugs to suppress their immune systems, ______ would normally destroy any cells from other animals.
A. at which
B. which
C. to which
D. as

[单项选择]One important aspect the old should learn from the young is that ______.


A. they should fully enjoy life and reject worries
B. they should expect a better future and cherish the hard past time
C. they should try to integrate leisure in work
D. they should learn to indulge in material life

[单项选择]One aspect of the recent population trend is the ______.


A. development of complexes of cities
B. increasingly grcat distance between cities
C. transformation of cities into suburbs
D. growth of many small towns

[单项选择]What is the most important one among the realities listed in the passage


A. New vulnerabilities will be introduced into your environment every day.
B. The manager educates employees about properly configuring firewalls and intrusion detection systems for their PCs.
C. Managers have more responsibility than ever.
D. Security managers are asked to support increasing degrees of network availability and access.