---____________ difficulty you meet, remember that it might just be a touchstone.
---You are right. __________ difficult it is, we will never give inA.However; whateverB.However; howeverC.Whatever; whateverD.Whatever; however
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D解析试题分析：考查让步状语从句：句意：无论你遇到什么困难，记住这只是一块试金石。--你是对的，无论多么困难，我们永远不会放弃。第一空填whatever，因为whatever修饰名词，第二空填however因为however修饰形容词或副词，选D。
考点：考查让步状语从句