单项选择题

A complete investigation into the causes of the accident should lead to improved standards and should______new operating procedures.

A. result in
B. match with
C. subject to
D. proceed with
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单项选择题
Not having made adequate preparations, they thought it better to______the excursion till next week.
A. take
B. remain
C. proceed
D. postpone
单项选择题
Users must never give their password to ______over the computer network, no matter how official the request appears.
A. everyone
B. anyone
C. other
D. nobody
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