Scientists think that the difference between animals and man is______．
A. animals cannot learn
B. animals cannot speak
C. animals cannot think like us
D. animals do not have their own language
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In order to live longer______．
A. we have to try to be on a diet
B. we shouldkeep inhigh spirits
C. we should trV to do more exercise
D. we should postpone the process of aging
In 2006, she was elected ______ chairman of the Student Union.
A. an
B. a
C. \
D. the
We can refer from the passage that the White House was first built ______.
A. on a low and damp site
B. among trees and flowers
C. on a small island
D. on a small hill
Now,scientists still don't really know______．
A. whether animals can think about the past and the future
B. how children learn and what happens when we speak
C. why animals can understand some things more quickly than human beings
D. at what age,a child can speak his language very well
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