单项选择题

When （）why he walked in without permission, he just stared at us and said nothing.

A．asking
B．asked
C．being asked
D．to be asked

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单项选择题
The industrial processes, （）, are based on man—made processes.

A．in case
B．in detail
C．in general
D．in brief
单项选择题
下列四个选项中最符合原文的选项为（）

A．good
B．cold
C．out—of—door
D．inside
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