Some biographers have not only disputed the common notion that Edgar Allan Poe drank to excess but also questioned whether he drank at all. (A) have not only disputed the common notion that Edgar Allan Poe drank to excess but also questioned whether he drank (B) not only have disputed the common notion that Edgar [...]

A calendar stick carved centuries ago by the Winnebago tribe may provide the first evidence that the North American Indians have developed advanced full-year calendars basing them on systematic astronomical observation. (A) that the North American Indians have developed advanced full-year calendars basing them (B) of the North American Indians who have developed advanced full-year [...]

The underlying physical principles that control the midair gyrations of divers and gymnasts are the same as the body orientation controlling astronauts in a weightless environment. (A) as the body orientation controlling (B) as the body orientation which controls (C) as those controlling the body orientation of (D) ones to control the body orientation of [...]

Scientists from the Cytolab team are conducting experiments to see whether proteins will prematurely turn into solids in silk-producing animals under laboratory conditions. A. to see whether proteins will prematurely turn into solids B. to see whether proteins should prematurely turn into solids C. to see if proteins will prematurely turn into solids D.that see [...]

Although many brands of gasoline are sold on Haibei island, gasoline companies there get all of the refined gasoline they sell from Haibei seaport’s only storage tank, which is always refilled with the same quality of gasoline. Therefore, the brands of gasoline for sale on Haibei may be different in name and price, but there [...]

Unlike the wholesale price of uncut diamonds, the wholesale price of other uncut gemstones has fallen considerably in the last year. Thus, although the retail price of jewelry made with gemstones other than diamonds has not yet fallen, it will inevitably fall. Which of the following, if true, most seriously weakens the argument above? A) [...]

Although numbers of animals in a given region may fluctuate from year to year, the fluctuations are often temporary and, over long periods, trivial. Scientists have advanced three theories of population control to account for this relative constancy. The first theory attributes a relatively constant population to periodic climatic catastrophes that decimate populations with such [...]

In recent years, teachers of introductory courses in Asian American studies have been facing a dilemma nonexistent a few decades ago, when hardly any texts in that field were available. Today, excellent anthologies and other introductory texts exist, and books on individual Asian American nationality groups and on general issues important for Asian Americans are [...]

A patient accusing a doctor of malpractice will find it difficult to prove damage if there is a lack of some other doctor to testify about proper medical procedures. (A) if there is a lack of some other doctor to testify (B) unless there will be another doctor to testify (C) without another doctor’s testimony [...]

As well as getting away unscathed, Kim managed to gather valuable knowledge about orchids and bring home scores of rare specimens, compliments of Brazilian environmentalists. A. As well as getting away unscathed, Kim managed to gather valuable knowledge about orchids and bring home scores of rare specimens B .Besides getting away unscathed, Kim also managed [...]

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As the etched lines on computer memory chips have become thinner and the chips’ circuits more complex, both the power of the chips and the electronic devices they drive have vastly increased. (A) the chips’ circuits more complex, both the power of the chips and the electronic devices they drive have (B) the chips’ circuits [...]

For the safety-conscious Swedish market, a United States manufacturer of desktop computers developed a special display screen that produces a much weaker electromagnetic field surrounding the user than do ordinary screens. Despite an advantage in this respect over its competitors, the manufacturer is introducing the screen into the United States market without advertising it as [...]

Species interdependence in nature confers many benefits on the species involved, but it can also become a point of weakness when one species involved in the relationship is affected by a catastrophe. Thus, flowering plant species dependent on insect pollination, as opposed to self-pollination or wind pollination, could be endangered when the population of insect-pollinators [...]