单项选择题

When you are in your room, leave the door ______ so that your visitors do not have to knock.

A．open
B．opened
C．opening
D．being open
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单项选择题
I was unaware of the critical points involved, so my choice was quite ______.
A．artistic
B．artificial
C．arbitrary
D．mechanical
单项选择题
The ghostly presence was just a(n) ______ sensation of some people.
A．objective
B．subjunctive
C．subjective
D．objected
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