Question

It is know 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
提示：

　　从句意上看，只有A正确。

　　句意：“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。”