Answer:
The tone of the poem "Promises Like Pie-Crust" by Christina Rossetti is one of skepticism and bitterness. The speaker seems to be disillusioned with love and relationships, and is critical of the idea of making promises that cannot be kept. The tone is conveyed through the use of metaphors, such as comparing promises to pie-crust, which is easily broken and crumbles away. The repetition of the phrase "promise and pie-crust" also emphasizes the speaker's skepticism and cynicism. Overall, the tone of the poem is bitter and disillusioned, reflecting the speaker's negative view of love and relationships.