Here is the item:
At the beginning of the semester, Joyce anticipated learning about Egyptian archeology. Her interest __________, however, as the monotonous lectures of Professor Nelson provided facts dustier than mummy wrappings.

The blank requires the simple past of shrink, an irregular verb. You chose shrank, one of two correct forms. Hallelujah!

Verb Simple
Present
Simple
Past
Past
Participle
shrink shrink(s) shrank or shrunk shrunk or shrunken

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