Question

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

1. A.
   unless
2. B.
   whenever
3. C.
   although
4. D.
   if

Answer 1

A
解析：unless除非；whenever无论何时；although尽管；if如果．题意：众所周知的是：除非你有规律地锻炼，否则你不会保持身体健康．
命题立意：考查状语从句，需要考生读懂题意，以及每个选项的确切含义方能解题．