_________difficultandchallengingthetaskmaybe,wemustfinishitontime,bec

_________ difficult and challenging the task may be, we must finish it on time, because there is a possibility _________we’ll be fired if we can’t fulfill the task on time．A.Whatever; thatB.However; that C.Whatever; whichD.However; as

B解析试题分析：考查Whatever和 However的用法和从句，However后跟形容词或副词；Whatever后跟名词。That引导的同位语从句，所以选B考点：考查Whatever和 However的用法和从句点评：要知道它们的用法，做此类题时，就很很容易做出选择；做从句题时，首先看从句是否缺少成份，如果缺少就在关系代词里找引导词；如果不缺少成份，就在关系副词里选择引导词

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