Rearrange the following sentences into coherent phrases. Identify if a sentence is incomplete and explain why.

Here are the rearranged sentences:

1. My mother was angry with me.

   $$\boxed{\text{My mother was angry with me.}}$$

2. A complete sentence cannot be formed using only the words "let, us, some, day" as a verb is missing. The most coherent phrase that can be formed is:

   $$\boxed{\text{Let us some day...}}$$