They're____knocking at the back door(尝试)
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They''re____knockingatthebackdoor(尝试)They''re____knockingatthebackdoor(尝试)They''re____knockingattheback
They're____knocking at the back door(尝试)
They're____knocking at the back door(尝试)
They're____knocking at the back door(尝试)
trying.随便试试.try to 是尽力.
trying
trying