a free sample / immediately after / of Shampoo / will be sent / fill the form / to you / you
【正确答案】：A free sample of Shampoo will be sent to you immediately after you fill the form.
【题目解析】：句意为您填完表格后，我们会立即寄给您免费的洗发水样品。after意为”在......之后“，引导时间状语从句；主句是 一般将来时；after 从句用 一般现在时或现在完成时代替将来完成时。
