第三阶段：GMAT OG13语法部分正确句子汇总【荐】.pdf

OG13 SC正确句子汇总 1. In a review of 2,000 studies of human behavior that date back to the 1940s, two Swiss psychologists declared that since most of the studies had failed to control for variables such as social class and family size , none could be taken seriously 2. Manufacturers rate batteries in watt-hours; if the higher the watt-hour rating, the longer the battery can be excepted to last. 3. Although a surge in retail sales has raised hopes that a recovery is finally under way, many economists say that without a large amount of spending the recovery might not last. 4. At the end of 1930s, Duke Ellington was looking for a composer to assist him-——someone who could not only arrange music for his successful big band, but also mirror his eccentric writing style in order to finish the many pieces he had started but never completed. 5. Of all the vast tides of migration that have swept through history, perhaps none was more concentrated than the wave that brought 12 million immigrants onto American shores in little more than three decades. 6. Diabetes, together with its serious complications, ranks as the nations third leading cause of death, surpassed only by heart disease and cancer. 7. The intricate structure of the compound insect eye, with its hundreds of miniature eyes called ommatidia, helps explain why scientists have assumed that it evolved independently of the vertebrate eye. 8. In late 1997, the chambers inside the pyramid of the Pharaoh Menkaure at Giza were closed to visitors for cleaning and repair because moisture exhaled by tourists had raised the humidity within them to such levels that salt from the stone was crystallizing and fungus was growing on the walls. 9. In 1979 lack of rain reduced Indias rice production to about 41 million tons, nearly 25 percent less than the 1978 harves