pick it up语法问题there's one dollar on the floor.pick __ (它)up?
pick it up语法问题
there's one dollar on the floor.pick __ (它)up?填什么 it"吗 还是"its"
there's one dollar on the floor.pick __ (它)up?填什么 it"吗 还是"its"
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你能帮帮他们吗