She won’t lose weight she keeps a diet and takes exercise every day.A. unlessB. ifC. becau

问题补充：

She won’t lose weight she keeps a diet and takes exercise every day.

A. unless

B. if

C. because

D. since

答案：

(答案→)A. unless

B. if

C. because

D. since

解析：句意:除非她每天节食，并且做运动，否则她不会减肥。本题考查连词，unless 除非，如果不，引导条件状语从句；if 如果，引导条件状语从句；because 因为，引导原因状语从句；since 自从，表示时间；或既然，表示原因。根据句意可知选Ａ。