He asked his teacher ________．A.if there was a monster in Loch NessB.when was Albert Einstein bornC.how would the scientists find out the resultD.where could he find the library．
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A解析分析句子要用间接引语，而其语序应该是陈述句的语序，所以应该选陈述语序的句子if there was a monster…；而其他三个句子都是疑问句的语序was/would/could这些情态动词或系动词在主语的前面；所以选择if there was a…．