单项选择题

There ought to be less anxiety over the perceived risk of mountain climbing than ______ in the public mind today.

A．exists
B．exist
C．exiting
D．to exist
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单项选择题
The Managing Director said that improving relations with the association would not be easy, but that they ______to try.
A．would have decided
B．decide
C．have decided
D．had decided
单项选择题
It is not so much the language ______ the cultural background that makes the book difficult to understand.
A．but
B．nor
C．as
D．like
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