2. 外语
  3. It is necessary that something urgent______ to combat smuggling.

It is necessary that something urgent______ to combat smuggling.

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问题 It is necessary that something urgent______ to combat smuggling.
选项 A、is done
B、be done
C、has to be done
D、must be done
答案B
解析 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。
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