_______ you start eating in a healthier way, weight control will become much easier.
A. unless B. Although C. Before D. Once
_______ you start eating in a healthier way, weight control will become much easier.
A. unless B. Although C. Before D. Once
D【解析】考察状语从句连词辨析。once，一旦，相当于if，句意：一旦你开始健康饮食，控制体重就会很容易。根据题意选D .