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请问这个选什么?It is necessary that the problem____in some way or other.A is settled B was settled C be settled D has been settled 很纠结ACD到底选哪个?

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请问这个选什么?It is necessary that the problem____in some way or other.
A is settled B was settled C be settled D has been settled 很纠结ACD到底选哪个?
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正确答案是:C
【解析】:It is necessary that sb (should ) do sth,这个句子采用虚拟语气,should 可省.
同样的类似的词语还有 important/essential/proper/urgent/advisable/strange/natural等等.
问题是被解决,省略了should,就是be settled,故正确答案是C.
【翻译】:这个问题必须用某种方法解决.