Modernsciencehasfoundthatoneisusingchopsticks,over30jointsandover50musclesareused,whichisafavorablestimulationtothebrain.()A.sinceB.althoughC.unlessD.while
Modern science has found that _______ one is using chopsticks,over 30joints and over 50
muscles are used,which is a favorable stimulation to the brain.( )
A. since
B. although
C. unless
D. while
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