单项选择题

The promotion literature should be upgraded because many new products have come out.

A． Right
B． Wrong
C． Doesn't say
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单项选择题
Those present at the meeting put forward suggestions to solve the problem of office security.
A． Right
B． Wrong
C． Doesn't say
单项选择题
Some important documents had been missing.
A． Right
B． Wrong
C． Doesn't say
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