According to the first paragraph, which of the following is true about the tem“organic food"?
A.It is accepted by most nutritionists.
B.It has been used only in recent years.
C.It has no fixed meaning.
D.It is seldom used by consumers.

...................helps us know many problems in the world.
A.Transportation
B.Media
C.Air
D.Factories

We can refer from the passage that .................
A.the factories owners must live in the city
B.the factories should owners don't want to live the in pollution
C.factories should be in the city
D.factories shouldn't be in the city

The word "them" in line 3 of the passage refers to................
A.newspapers
B.factories
C.problems
D.people

The word ‘“others“ in paragraph 1 refers to_____
A.advantages
B.advocates
C.organic foods
D.products

The word “they” in the last paragraph refers to_______
A.sediments
B.cores
C.climates
D.years

The word “extracting" in the second paragraph is closest in meaning to_____
A.locating
B.breaking
C.analyzing
D.removing

The Deep Sea Drilling Project was significant because it was______
A.attempt to find new sources of oil and gas
B.funded entirely by the gas and oil industry
C.the first extensive exploration of the ocean bottom
D.composed of geologists from all over the world

The author mention outer space in the first paragraph because______
A.it is similar to the ocean floor in being alien to the human environment
B.techniques used by scientists to explore outer space were similar to those used in ocean exploration
C.the Earth‘s climate millions of years ago was similar to condition in outer space
D.rock formations in outré space are similar to those found on the ocean floor

The author refers to the ocean bottom as a “frontier” because it______
A.attracts courageous explorers
B.is not a popular area for scientific research
C.contains a wide variety of life forms
D.is an unknown territory