单项选择题

The members would resign if they ______asked to do so.

A． are
B． were
C． will be
D． would be
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单项选择题
Only five years ago, there ______a shortage of computer specialists.
A． was
B． were
C． has been
D． have been
单项选择题
The company offers a ______plan for its workers.
A． retirement
B． retiring
C． retire
D． retired
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