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It is important that we ( )the news secret.

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It is important that we ( )the news secret.
A:must keep B:would keep C:should keep D:kept
应该选哪个,为什么
C.
虚拟语气类型之一:
如果有表示必要性、重要性等含义的形容词,that 引导的主语从句中,谓语动词要用虚拟语气,其形式与有表示建议、命令、要求等含义的过去分词结构中的主语从句谓语动词相同
It is+important(重要的)+that+主语+should+原形动词,should可以省略.
这类形容词还有:advisable,essential,important,urgent,imperative等.例如:
It is important that we (should ) speak politely.
我们说话要有礼貌,这是很重要的.
It is imperative that we (should ) practise criticism and self-criticism.
应当进行批评和自我批评.