A.However a serious problem B.What a serious problem C.However serious a problem D.What serious a problem 答案 C [句意:不论你的问题有多严重,你都应该鼓起勇气,接受挑战。考查状语从句。分析题干可知逗号前是让步状语从句,what不能用来引导状语从句,所以排除B、D两项;however+adj.+a/an+单数名词=whatever+a/an+adj.+单数名词。故C项正确。] ②(2010·上海卷)________you may have, you should gather your courage to face the challenge. A.However B.Whatever C.Whichever D.Whenever 答案 A [句意:不管你多么努力,如果不减少食量,想要减肥会很难。考查让步状语从句。根据设空后的副词hard可知答案为however, however hard相当于no matter how hard。whatever无论什么,与名词连用;whichever无论哪一个;whenever无论什么时候。] ③(2017·湖南卷)________hard you try, it is difficult to lose weight without cutting down the amount you eat. A.whichever B.whenever C.whoever D.wherever 答案 C [句意:为了表示我们的尊敬,无论与谁握手,我们通常得摘下手套。shake hands with sb与某人握手,本句中的with后缺少宾语,结合句意选C项,whoever在句中引导让步状语从句。] ④(2011·重庆卷)To show our respect, we usually have to take |