the chicken is fat and the chicks are thin（一般过去时）

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• The chicken is fatand the chicks are thin.改为一般过去时
• the chicken is fat and the chicks are thin（一般过去时）
• Today is Saturday.It's a sunny day.My family go to the park and have a picnic there.Look!Here ( 1 )some hamburgers.They are tasty.They are my ( 2 ).Dad likes chicken very much.( 3 )it's delicious.Mom is a little(4).She has to (5)some vegetables..1( );A:am.B:is.C:are.2:( )A:like.B:favourite.C:like.3( ):A:So.B:But.C:Because.4:A:fat.B:thin.c:old.5:( )A:eats.B:eat.C:take.
• 两个数a和b进行“模2^n加”运算和“模(2^n+1)乘”运算是怎么个过程?用数学表达式该如何表达?
• reach/be reached