Please write to me at once when you arrive .(同义句)
Please write to me at once when you arrive .(同义句)
Please write to me at once when you arrive .(改为同义句)
Please write to me ___ ___ ____ you arrive.
Please write to me at once when you arrive .(改为同义句)
Please write to me ___ ___ ____ you arrive.
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你能帮帮他们吗