单项选择题

________ he daydreamed, Peter saw figures in the sky.

A．Until
B．Since
C．While
D．During
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As I regard it, you can widen the ________ of these improvements through your active participation.
A．volume
B．dimension
C．magnitude
D．scope
单项选择题
The textbook question as well as other issues is going to be discussed when the congress is in ________ again next spring.
A．assembly
B．convention
C．conference
D．session
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