Question

It is known to all that ________ you exercise regularly, you won’t keep good health．

[　　]

A．

unless

B．

whenever

C．

although

D．

if

Answer 1

答案：A
解析：

unless意为“如果不；除非”，引导条件状语从句。全句意为“除非你有规律地锻炼，否则你不会保持健康的身体”。