According to the passage, the drilling of the glacier in eastern Antarctica was important
A. allowed scientists to experiment with new drilling techniques
B. permitted the study of surface temperatures in an ice-covered region of Earth
C. provided insight about climate conditions in earlier periods
D. confirmed earlier findings about how glaciers are formed
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It can be inferred from the passage that the Archaeopteryx were classified as birds on the
A. imprints of bones
B. imprints of feathers
C. the neck structure
D. skeletons
The author mentions all of the following as examples of complex behavior. patterns evolved
A. migrating
B. nesting
C. singing
D. running
Ohio, the center of ______ the Hopewell culture, has the greatest concentration of ancient
A. called
B. what is called
C. that is called
D. is called
A．She understands why the man seems unhappy.B．She will help the man change his diet.C．
A. She understands why the man seems unhappy.
B. She will help the man change his diet.
C. The man should see a doctor.
D. The doctor has already explained the problem to her.
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