问题
选择题
__________hard you try, it is difficult to lose weight without cutting down the amount you eat.
A Whatever B Whichever C However D Whenever
答案
：C
：考查让步状语从句。关键词是后面的hard,说明前面应该是however，ABD项后面不能接形容词。However后面接形容词或者副词，表示让步。句意：无论你多么努力，如果不减少食量，要减肥都是很困难的。故C正确。