Look,the people __（pick）apple为什么用are picking?

Look,the people __（pick）apple为什么用are picking?
Look,the people __（pick）apple为什么用are picking?

Look,the people __（pick）apple为什么用are picking?
are picking
look是现在进行时态的标志
表示正在发生的事情,所以是用ing形式

因为people是单复数同形 指人们
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因为 前面 有祈使句 look