I can't stand swimming in cold rivers in winter.
But it's ______ for your health.You know I often swim in rivers in different seasons.( )
A.helpfulB.harmfulC.painfulD.careful
I can't stand swimming in cold rivers in winter.
But it's ______ for your health.You know I often swim in rivers in different seasons.( )
A.helpfulB.harmfulC.painfulD.careful