You ___(ask) for permission before you left the table.

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You ___(ask) for permission before you left the table.

You ___(ask) for permission before you left the table.
You ___(ask) for permission before you left the table.

You ___(ask) for permission before you left the table.
should have asked

should have asked

should ask

should ask

should ask
你应该在离桌前打招呼。