A-A+
It is necessary that something urgent______ to
问题详情
It is necessary that something urgent______ to combat smuggling.
A．is done
B．be done
C．has to be done
D．must be done请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：B
考查虚拟语气。在“It+be+a．+that从句”中，that引导的主语从句谓语动词常用“(should)+动词原形”。用于该句型的形容词有necessary，important，urgent，essential，imperative，appropriate，advisable，desirable等。
