1) Created in October, 1972, the Consumer Product Safety Commission, which enacted a host of regulations affecting a wide range of goods, from overly flammable mattresses to unhealthy aerosol sprays to fireworks.
A. the Consumer Product Safety Commission, which enacted a host of regulations affecting a wide range of goods
B. the Consumer Product Safety Commission enacted a host of regulations affecting a wide range of goods
C. a host of regulations affecting a wide range of goods enacted by the Consumer Product Safety Commission
D. a host of regulations enacted by the Consumer Product Safety Commission, which affected a wide range of goods
E. when a host of regulations affecting a wide range of goods was enacted by the Consumer Product Safety Commission
2) The radiation emanating from the Sun has been very nearly constant for millions of years, but the amount of heat that falls on Earth’s surface depends on both the length of the period of daylight as well as on the angle of incidence of incoming sunlight.
A. depends on both the length of the period of daylight as well as on
B. depends both on the length of the period of daylight as well as
C. depends both on the length of the period of daylight and on
D. both depends on the length of the period of daylight and
E. both depends on the length of the period of daylight and on
3) Because you simultaneously focus two eyes on an object, employing a sophisticated method of determining distance and perceiving depth, we call our vision binocular.
A. you simultaneously focus two eyes on an object
B. you simultaneously focus on an object by two eyes
C. of our simultaneous focus on an object with two eyes
D. of our simultaneously focusing on an object by two eyes
E. we simultaneously focus two eyes on an object
4) A gale-force solar storm that hit the Earth on March 13, 1989, sent electrons arcing across power lines, railroad tracks, and expanses of iron-bearing rock in eastern Canada, where alarmed engineers tried but failed to keep the Hydro-Quebec power grid operating.
A. tried but failed to keep
B. tried but failed in their keeping
C. had tried but were failing in keeping
D. were trying but having failed to keep
E. were trying but they had failed in keeping
5) The body heat of reptiles and amphibians is not regulated by internal thermostats, therefore, they raise or lower their own temperature in that they seek or flee warmth, sometimes merely by moving into or out of direct sunlight.
A. thermostats, therefore, they raise or lower their own temperature in that they seek or flee
B. thermostats, therefore raising or lowering their own temperature by seeking or fleeing
C. thermostats, therefore, in raising or lowering their own temperature by seeking or fleeing
D. thermostats; therefore, they raise or lower their own temperature by seeking or fleeing
E. thermostats; therefore, they raise or lower their own temperature in that they seek or flee
6) Until about 10,000 years ago, humans had lived almost exclusively as hunters and gatherers, harvesting wild plants and animals, then, people had begun to cultivate domesticated plants, and to grow food.
A. animals, then, people had begun
B. animals, people then began
C. animals, so that then, people had begun
D. animals; so that then, people began
E. animals; then, people began
7) In 1777, when news reached Colonel Ludington that the town of Danbury, Connecticut, was being looted and burned by British troops, his daughter Sybil rode forty miles through the night so that the soldiers of her father’s regiment had been alerted to the danger.
A. so that the soldiers of her father’s regiment had been alerted
B. so that the soldiers of her father’s regiment may be alerted
C. alerting the soldiers of her father’s regiment
D. and alerting the soldiers of her father’s regiment
E. for alerting the soldiers of her father’s regiment
8) Two hundred million years ago, during the Jurassic period, all of the land area on Earth, found in one large continent called Pangea, which eventually broke apart through a process now known as continental drift.
A. all of the land area on Earth, found in one large continent called Pangea, which
B. one large continent, in which all of the land area on Earth was found, called Pangea, and it
C. one large continent called Pangea, in which all of the land area on Earth was found, which
D. one large continent was called Pangea, in which all of the land area on Earth was found and
E. all of the land area on Earth was found in one large continent called Pangea, which
9) In 1990, the Fish and Wildlife Service has placed the northern spotted owl on the threatened species list, a native of Pacific Northwest forests.
A. the Fish and Wildlife Service has placed the northern spotted owl on the threatened species list, a native of Pacific Northwest forests
B. the Fish and Wildlife Service placed the northern spotted owl, a native of Pacific Northwest forests, on the threatened species list
C. a native of Pacific Northwest forests, the Fish and Wildlife Service placed the northern spotted owl on the threatened species list
D. the northern spotted owl has been placed on the threatened species list by the Fish and Wildlife Service, which is a native of Pacific Northwest forests
E. the northern spotted owl, a native of pacific Northwest forests, placed on the threatened species list by the Fish and Wildlife Service
10) In the United States at the end of the nineteenth century, public places such as theaters, restaurants, shops, and banks had installed electric lighting, but electricity was in fewer than one percent of homes and lighting still provided mainly by candles or gas.
A. electricity was in fewer than one percent of homes and lighting still
B. electricity was in fewer than one percent of homes, where lighting was still
C. fewer than one percent of homes that had electricity, where lighting was still being
D. fewer than one percent of homes with electricity, having lighting that was still
E. fewer than one percent of homes had electricity, where lighting had still been
11) Mainly through the efforts of Jane Goodall, apes were revealed to be not blundering, primitive automatons, but beings with as complex and subtle social lives like us.
A. as complex and subtle social lives like us
B. complex and subtle social lives just like us
C. as complex and subtle social lives as us
D. social lives complex and subtle just as ours
E. social lives as complex and subtle as ours
12) In the sixteenth century, the forests were destroyed in Britain, which meant not only a shortage of the most important building material of the time, but also a fuel shortage.
A. the forests were destroyed in Britain, which meant not only a shortage
B. the forests in Britain were destroyed, which meant a shortage not only
C. the forests were destroyed in Britain, meaning a shortage not only
D. destruction of the forests in Britain meant not only a shortage
E. destruction of the forests in Britain meant a shortage not only
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