The group of research workers are said to ________ to the dangerous nuclear radi
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The group of research workers are said to ________ to the dangerous nuclear radiation while they carried out their rescue task.A.be exposed | B.have been exposed | C.exposed | D.be exposing |
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答案
B |
解析
考查非谓语动词。are said to do…据说……,所以排除C;且动词expose和逻辑主语The group of research workers是动宾关系,所以要用不定式的被动形式,排除D;expose这一动作发生在主句谓语动词are said之前,所以要用不定式的完成被动式。所以选B。 |
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