In 1924 America’s National Research Council sent two engineers to supervise a series of experiments at a telephone—parts factory called the Hawthorne Plant near Chicago.(2010年，what,when,who,where)
Research on animal intelligence always makes me wonder just how smart humans are.（2009年 what，how）
The idea that some groups of people may be more intelligent than others is one of those hypotheses that dare not speak its name. (2008年 what，how);
By 1830 the former Spanish and Portuguese colonies had become independent nations.(2007年 when,who, how)；
The homeless make up a growing percentage of America’s population.(2006年who ,how);
The human nose is an underrated tool.(2005年what,how);
Many theories concerning the causes of juvenile delinguency(crimes committed by young people)focus either on the individual or on society as the major contributing influence. (2004年what,how);
Teachers need to be aware of the emotional, intellectual, and physical changes that young adults experience. (2003年who，how)；
Comparisons were drawn between the development of television in the 20th century and the diffusion of printing in the 15th and 16th centuries. (2002年what， how， when)；
The government is to ban payments to witnesses by newspapers seeking to buy up people involved in prominent cases 1 the trial of Rosemary West. (2001年who，what，how)；
If a farmer wishes to succeed, he must try to keep a wide gap between his consumption and his production. (2000年who，why，how)；
Industrial safety does not just happen. (1999年what，how)；
A variety of activities should be organized 1 participants can remain active as long as they want and then go on to 2 else without feeling guilty and without letting the other participants 3 . （2003年第36题）