Swimming is a good wat to ___?A keep fit B keep health C keeping fit D keep healthily

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• Swimming is a good wat to ___?A keep fit B keep health C keeping fit D keep healthily
• 6.Eating apples( )us to keep healthy.A.lets B.helps C.takes D.makes6.Eating apples( )us to keep healthy.A.lets B.helps C.takes D.makes7.I know you are good ( )swimming,and it is good ( )your health.A.at,for B.at,at C.for,for D.for,at 8.I( ) you will get better soon.A.wish B.hope C.said D.tell
• Swimming is a good wat to ___?A keep fit B keep health C keeping fit D keep healthily
• 英语翻译
• 已知（x+y）的平方=16,（x-y）=4,求x的平方×y的平方的值