单项选择题

These plastic bags will ______ damage to environment.

A．make
B．do
C．lay
D．create
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单项选择题
The group contained four men exclusive ______ myself and my guide.
A．without
B．out
C．off
D．of
单项选择题
(Even) a professional psychologist may have difficulty talking (calm) and logically (about) (his own) problems.
A. Even
B. calm
C. about
D. his own
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