We learn from the beginning of the passage that Web business . (1999)

　　Manufacturers as mentioned in the passage tend to . (1999)

　　What were things like in 1980s when accidents happened? (1999)

　　The hot spot theory may prove useful in explaining . (1998)

　　Discerned from the perplexing picture of population growth the 1980 census provided, America in 1970s . (1998)

　　The official statistics on productivity growth . (1998)

　　According to the author, the American economic situation is . (1998)

　　What is the myth concerning giant dams? (1998)

　　In face of the recent attacks on the company, the chairman . (1997)

　　The tradition of hospitality to strangers . (1997)

　　In the eyes of visitors from the outside world, . (1997)

　　When Lloyd Nickson dies, he will . (1997)

　　2、考查因果关系的细节题

　　Today’s double-income families are at greater financial risk in that . (2007)

　　People nowadays can no longer achieve IQ scores as high as vos Savants because . (2007)