1. Q045
Zombies shambled into the diner, mistook fruit Jell-O for brains, and ___ on it.
The right choice is ...
gorged
they noisily gorged
they began gorging
You have brains! With a list of grammatical items—here, simple past tense verbs—you must maintain parallel structure. Gorged matches shambled and mistook.
They (subject) + gorged (verb) = clause. This option is not parallel for the list of simple past tense verbs.
They (subject) + began (verb) = clause. Again, this option does not keep the list of simple past tense verbs parallel.