单选题
I think it absolutely essential that all the facts ______ first.
A、
be examined
B、
were examined
C、
were to be examined
D、
must be examined
【正确答案】
A
【答案解析】
[解析] 虚拟语气。表示“建议、决定、要求、命令”类的that-分句中使用虚拟语气,谓语动词使用(should)+V原形。facts与examine之间存在动宾关系,故使用被动语态。
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