___ you can say about London People for sure is ___they talk a lot about weather.A.Which; whatB.What; thatC.That; whatD.What; which
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B解析考察名词性从句。What引导主语从句what you can say about London People for sure，并在句中作主语。第二孔的that引导表语从句，that起连接作用，没有任何意义。句意：关于伦敦人你能说的确定的事情是他们谈论天气很多。