How has science done to disservice to people?
A.Because of science, disease caused by contaminated food has been virtually eradicated.
B.The scientists have preserved the color of meats, but not of vegetables.
C.It caused a lack of information concerning the value of food.
D.As a result of scientific intervention, some potentially harmful substances have been added to our food.

All of the following statements are TRUE except .
A.Food may cause forty percent of the cancer in the world
B.Drug are always given to animals for medical reasons
C.Researchers have known about the potential hazard of food additives for more than 45 years
D.Some of the additives in our food are added to the food itself and some are given to the living animals

The word "additives" is closest meaning to .
A.dangerous substance
B.natural substance
C.begin substance
D.added substance

Where do people in Kenya give the name to the child?
A.at the village church
B.on the cattle farm
C.at their house
D.near the thorn fence

Which of the following is NOT mentioned in paragraph 2?
A.An eight-day-old child will be taken for the first walk by his or her mother.
B.Children have to learn their tribes' cultures and traditions when they are old enough.
C.Children are initiated for a mature life in the presence of their friends and family.
D.Children have to overcome a few trials to enter the grown-up world.

What does the word "they" in paragraph 3 refer to?
A.the Maasai herds
B.the wild animals
C.the young warriors
D.the cattle owners

The word "gathering" in the second paragraph refers to .
A.people
B.information
C.objects
D.substances

It can be inferred from the passage that .
A.Samuel Morse did not make a significant contribution to the communications industry
B.Morse's invention did not immediately achieve its full potential
C.The extension of the telegraph was more important than its invention
D.Journalists have the Associated Press to thank for the birth of the communications industry

What is the author's main purpose in writing this passage?
A.To explain the concept of labor.
B.To criticize certain uses of capital.
C.To contrast capital goods and consumer goods.
D.To define economic resources.

The word “inferior” in the passage is closest in meaning to .
A.modern
B.low-quality
C.well-equipped
D.unsafe