คำแนะนำของผู้เขียน
Use/Respond appropriately to polite expressions:
Greetings, leave-takings, expressing gratitude and apology, asking permission, offering help
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คำแนะนำของผู้เขียน
Use/Respond appropriately to polite expressions:
Greetings, leave-takings, expressing gratitude and apology, asking permission, offering help