Review the item:
When Richie jammed the photocopier for the eighth time, Sharon, the administrative assistant, picked up a heavy stapler and __________ it at his head.

The blank requires the past tense of throw, an irregular verb. Threw is the simple past form.

Verb Simple
Present
Simple
Past
Past
Participle
throw throw(s) threw thrown

Through, the form you chose, is not a verb; it is a preposition. Before you continue, review the rules for irregular verbs.

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