1.I want ( ) stay at home.2.Fish ( ) fly in the sky.3.Doctors often help the sick people in the ( )4.Mike kicks a good time.He is very ( )5.look at the traffic light.It is ( ).Let us go3X+2Y+Z=392X+3Y+2Z=4002X+Y+3Z=336解得X=60 Y=84 Z=443X+2Y+Z=39

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