单项选择题

There was ______ of complete silence.

A．an instant
B．hours
C．three minutes
D．seconds
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单项选择题
Students today are writing ______ of poetry.
A．a great many lines
B．quantities of lives
C．lots lines
D．a large number
单项选择题
When we get our tickets, ______ be marked first class .
A．it is to
B．it will
C．they were to
D．they will
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