【官方】SAT写作每日一题附答案和解析(2018年1月11日)

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每日一练

Writing ; Language

To show how a common desk fan cools a person, Rhett Allain, a physics

professor and writer for Wiredmagazine, performed a simple experiment. He wet

apaper towel with warm water and wrapped it arounda thermometer. Allain wrapped

a secondthermometer in a dry paper towel. Afterward, he set both thermometers in

front of a fan. Initially the fan was turned off. Thetemperature of the

thermometer wrapped in the wet paper towel decreased—at first rapidly, then more

slowly—and eventually dropped below room temperature. After the fan was

turnedon, the temperature of the wet thermometer underwent another rapid

decrease. Bycontrast, the temperature of the thermometer wrapped in the dry

paper towel barelychanged during the entire experiment. This experiment

demonstrated the power ofevaporation to cool wet objects, such as a sweaty

person, and the role of a fan in makingevaporation more effective.

Which choice most effectively combines the underlined sentences?

A.Allain wrapped a second thermometer in a dry paper towel, and then he set

boththermometers in front of a fan.

B.Wrapping a second thermometer in a dry paper towel, Allain set both

thermometers in frontof a fan.

C.Before setting both thermometers in front of a fan, Allain had wrapped a

secondthermometer in a dry paper towel.

D.Allain set both thermometers down in front of a fan, but first he wrapped a

secondthermometer in a dry paper towel.

答案：A

解析：

Choice A is the best answer because it most effectively combines the

underlined sentences. It presents two steps in the experiment in the most

logical sequence: First, Allain wrapped a second thermometer in a dry paper

towel. Then, he placed the thermometer wrapped in the wet paper towel and the

thermometer wrapped in the dry paper towel in front of a fan.