children后面接动词三单还是复数形式?children本身是复数还是单数?The child __ trees for the whole four hours with his parents.接has been planting还是have been planting?

分类: 作业答案 • 2022-04-15 09:50:19

问题描述：

children后面接动词三单还是复数形式?children本身是复数还是单数?
The child __ trees for the whole four hours with his parents.接has been planting还是have been planting?

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