hard you try it is difficult to lose weight without cutting down the amount you eat . A.

问题补充：

hard you try, it is difficult to lose weight without cutting down the amount you eat .

A. However

B. Whatever

C. Whichever

D. Whenever

答案：

(答案→)A. However

B. Whatever

C. Whichever

D. Whenever

解析：

试题分析: A无论如何；B无论什么；C无论哪个；D无论何时。句意：无论你多么努力，如果你不减少饮食的量是很难减肥成功的。“However+形容词或副词+主语+谓语”构成让步状语从句，表示“无论……”，而其他连词后不跟形容词或者副词，答案选A。