单项选择题

Mr. Teitelbaum's three-point check involves all of the following EXCEPT ______.

A．the ground
B．the trunk of a tree
C．the helmet
D．the branches and leaves of a tree
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单项选择题
To secure safety, Mr. Teitelbaum does all of the following EXCEPT that ______.
A．he will climb with a partner so long as he can find one
B．he carries a cell phone
C．he does a three-point check
D．he took a $400 course for tree-climbing
单项选择题
In their efforts to define the alcoholic personality , some scientists ______.
A．have identified typical alcoholics
B．have identified preoccupation with self as a cause of alcoholism
C．have found that alcoholics have some characteristics in common
D．have produced an accurate description of a typical alcoholic
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