if_ calls me when i am out,ask him to leave his phone number.a.somebody b.someone c.anything d.a

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if_ calls me when i am out,ask him to leave his phone number.a.somebody b.someone c.anything d.a
if_ calls me when i am out,ask him to leave his phone number.a.somebody b.someone c.anything d.a

if_ calls me when i am out,ask him to leave his phone number.a.somebody b.someone c.anything d.a
b
表示不确定的代指“有人”