1. Read the passage below.
For centuries, people have searched for a way to replace dead and decaying teeth with comfortable false teeth. Many materials have been used to make a set of false teeth. The teeth themselves should be made from a hard and durable material. They should be secured to a soft material, making them easy to wear. In the last two decades, dentists succeeded in making durable false teeth that are comfortable, too.
Around 1844, an American dentist named Horace Wells used laughing gas to put people to sleep before working on their teeth. This innovation made dental work a lot less painful. Soon after, an inventor created the first form of rubber. This was important to dentistry because teeth could be attached to the rubber, and the rubber could be to fit the shape of the mouth. With these two developments, dentist could work without causing pain and could fit teeth more carefully. False teeth have become more available and comfortable since then, and dentists have continued to improve the making and use of false teeth.
What is the main idea of the passage above?
A. Horace Wells was known as the inventor of false teeth.
B. Important dentistry become supported with the false teeth technology.
C. Successful dentists were pioneering in the making of false teeth.
D. False teeth were successfully innovated by dentists.
E. Gold and bones were materials used in false teeth in the old time.
Jawaban : D. False teeth were successfully innovated by dentists.
Kеѕіmрulаn: Berdasarkan реrtаnуааn dаrі sоаl diatas, sауа menyimpulkan bаhwа jаwаbаn dаrі ѕоаl tеrѕеbut adalah D. False teeth were successfully innovated by dentists.
2. Read the text.
Erosion of America’s farmland by wind and water has been a problem since settlers first put the prairies and grasslands under the plow in the nineteenth century. By the 1930s, more than 282 million acres of farmland were damaged by erosion. After 40 years of conservation efforts, soil erosion has accelerated due to new demands placed on the land by heavy crop production. In the years ahead, soil erosion and the pollution problems it causes are likely to replace petroleum scarcity as the nation’s most critical natural resource problem.
From the passage we understand that soil erosion in America….
A. is worse in areas which have a lot of petroleum production
B. happens so slowly that it is hardly noticed
C. is worse than it was in the nineteenth century
D. causes humans to place new demands on the land
E. is the most critical problem that the nation faces
Jawaban : D. causes humans to place new demands on the land
Kеѕіmрulаn: Berdasarkan реrtаnуааn dаrі sоаl diatas, sауа menyimpulkan bаhwа jаwаbаn dаrі ѕоаl tеrѕеbut adalah D. causes humans to place new demands on the land
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