Answer:
"They were smiling and glad to be marching but their heads were slimpsing down and their smiles were half fading away and their eyes were half shut or a little more than half shut."
Step-by-step explanation:
This is the excerpt that includes repetition and alliteration. Repetition refers to the presence of the same group of words several times within a text. In this sentence the author repeats the phrase "half shut" twice. Moreover, the author uses alliteration, which refers to the repetition of a consonant sound at the beginning of several words close together. In this case, the author repeats the sound "s" in several words, such as "smiling," "slimpsing" and "smiles."