Question

You won’t lose weight______you keep a diet and take exercises every day.

A．because

B．unless

C．if

D．but

Answer 1

B

试题分析：because因为；unless除非，如果不；if是否，如果不；but但是。句意：如果你每天不保持饮食和参加锻炼，你就不能减肥。结合语境可知选B。