The farmers are picking cotton in the field为什么用picking不用picking up?pick与pick up 什么区别？

the farmers are busy ( )《pick》 apples. The Greens are helping the farmers _____(pick) apples. The farmers are all busy____the apples now.A.to pick B.picking C.pick D.picked the farmers are trying to pick all the apples(对划线部分提问）划线部分：pick all the apples The farmers are picking cotton in the field为什么用picking不用picking up?pick与pick up 什么区别？ We must ___________ (follow) the rules.Are you going to help the farmers ________(pick) apples? 就画线部分提问The students are going to help the farmers to pick apples next Sunday.The students are going to help the farmers to ＿＿(＿pick apples ) next Sunday. The farmers are working______the fields. The farmers ______(pick) apples when I saw them. The farmers are working in the f______........................................................................................................ There are two farmers ( ) the apple trees Farmers are planting v_____ in the field. Farmers are usually very( )in the season? The farmers are very () in autumn. 用正确形式真空 Let's ________ (help) the farmers ________ (pick) up the apples. The farmers are busy harving the crops in the f____ Are they helping the farmers ___ the work? Potatoes are()in the field by the farmers