-Whatisyouradvice?-________necessary,you’dbetternotrefertothedictionary.

发布时间:2020-08-04 20:37:04

-What is your advice?-________ necessary, you’d better not refer to the dictionary.A.If itB.If it isC.UnlessD.Unless it

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C解析在本题中,if引导句子前后逻辑不通,应当排除,前面部分补充完整为:Unless it is necessary,省略it is,只有C项合适。
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