单项选择题


A．rule off
B．rule out
C．rule over
D．rule of
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单项选择题
The bold word it refers to which of the following
A．Problem.
B．Material.
C．Difficulty,
D．System.
单项选择题
A．to contractB．being contractedC．contractingD．contract
A．to contract
B．being contracted
C．contracting
D．contract
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