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

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：本题考查的让步状语从句。句意：如果你不减少饮食的话，无论你多么努力尝试，也难减肥成功。此处的关键字眼是hard，hard既然被提到主语前，说明引导词应和hard一起来引导从句，而能够修饰hard的只有however一词，所以答案选A。另外，however还可用作连接性副词，表转折，“然而”之意。此处的however意为“无论多么”。