They spent (ten years) planting th trees.就括号内部分提问.( )( ) ( )they ( )planting trees

问题描述:

They spent (ten years) planting th trees.就括号内部分提问.( )( ) ( )they ( )planting trees

(How )( long ) ( did)they (spend )planting trees
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不明白的再问哟,请及时采纳,多谢!