A.massage
B.message
C.manage
D.village

A.sender
B.complete
C.penalty
D.bedroom

A.pollution
B.synthetic
C.politics
D.electric

I only have time to tell you the main idea of it , not the details.
A.fist
B.gist
C.twist
D.list

The word ”agents” is closest in meaning to _____
A.examples
B.causes
C.areas
D.dangers

the fact that the “land largely the site of erosion” is significant because____
A.erosion is less destructive than sedimentation
B.fossils are most common in areas subject to erosion
C.erosion contributes to the destruction of skeletal remains
D.few organisms live in areas that experience extensive erosion

The word “aided ” in the second paragraph is closest in meaning to____
A.counted
B.reformed
C.reversed
D.helped

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