No one doubts __ he is the best leader in the company.A.whet

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No one doubts __ he is the best leader in the company.A.whether B.what C.if D.that
答案为何不选A?

that 否定句用that
疑问句用疑问词
祝你学习进步!
望采纳,谢谢!
再问：可答案怎么是C？我还以为是为了区别whether和if？
再答： whether比if更有强烈的怀疑味道。这是书上的解释接that，表示不相信。否定句常用that，肯定句用whether或者if。遇到这样的题目是在太刁钻了。建议按照常规学习啊。
再问： “doubt后面的句子表达肯定的意思用if，表达怀疑的态度用that”。有这条规则吗？
再答：是的。我的那本书《高中英语词典》是这么说的。
再问： ‘毫无疑问，在公司里他是最好的领导者",doubt后面的句子表达的是肯定的意思，所以用if？能否举个用that的句子？
再答： I doubt that it is true.我怀疑它是真的 She doubts that they happen everyday.他不相信奇迹每天都会发生。你是高中生还是大学生？建议不要争了，好吗？我给高中生讲的都是规律，而且高中教材就用这样的句型哦！高中教材二（上）P2 ，04版有原句型 I doubt..... There is no doubt that......

No one doubts __ he is the best leader in the company.A.whet No one doubts ______ he is the best leader in the company. it is no doubt () he will win the frist prize A.which B.whet He is one of the best shots in the country,who has beaten __ He is the second __ man in his company.A.tall B.taller C.tal He is ( ) ( ) one of the best writers in the world. He is one of the best runner in the world. He is the best __ english in our class He studies hard and he is the best one in his class,____?A.d 把he is considered one of the best television host a party in He is ( )（承认） as a leader of the team he is one of the experienced engineers in this company ehose