Why does the author mention “aragonite” in the last line?
A.To argue that certain fossils are more informative than others.
B.to explain why fossils are rare
C.To illustrate the kinds of inorganic hard parts that can form fossils
D.To compare aragonite fossils and calcite fossils.

what is the author’s main point in paragraph 3?
A.Weathering makes it impossible to identify many fossils.
B.Many fossils have been buried forever under the soil.
C.Fossils provide a limited sample of ancient organisms
D.It is easier to find the remains of plants than animals

According to the passage, an organisms without hard body parts____
A.is not heavy enough to sink below the surface
B.is not attractive to predators
C.is not likely to appear in the fossil record
D.takes a long time to decay

(A) Believed that Jack (B) had got home (C) safely , we felt (D) relieved.
A.Believed
B.had got
C.safely
D.relieved

The need (A) for (B) a well rounded education was an idea (C) espoused by the Greeks (D) in time of Socrates
A.for
B.a well rounded education
C.espoused
D.in time of

With its (A)(B)strong claws and its many (C) protruding tooth a gopher(D) is an excellent digger.
A.With
B.trong claws
C.protruding tooth
D.is

_______(19)
A.advantage
B.key
C.challenge
D.access

__________(21)
A.means
B.patterns
C.tools
D.styles

___, they continue to overeat and to eat the wrong food
A.Many overweight people realizing that they are threatening their health
B.Because of the fact that many overweight people are threatening their health
C.However many overweight people realize that they are threatening their health
D.even though many overweight people realize that they are threatening their health

We can determine the family that a bird falls in to by____like.
A.what the shape and behaviour of a bird are
B.what the bird’s shape and behaviour
C.the shape and behaviour of a bird
D.what are the shape and behaviour of a bird