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Experts suggest that all computers be checked______to protect important files an
Experts suggest that all computers be checked______to protect important files an
游客
2025-06-14
23
管理
问题
Experts suggest that all computers be checked______to protect important files and programs.
选项
A、period
B、periodic
C、periodically
D、periodical
答案
C
解析
单词形态:副词1.空格前出现了被动语态。动词变为被动语态时后面可接副词。因此副词(C)periodically为正确选项。2.you should check all computers periodically改为被动语态时,应为all computers should bechecked periodically。that前suggest是表建议的动词,因而should应省略。
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