Here is the item:
Robin cannot __________ anything on the counter. Money, glasses of orange juice, stacks of paper—all of these items get swatted to the floor by Buster, her mischievous cat.

Robin cannot put anything on the counter. Thus, you need a form of lay. After an auxiliary verb like can, you need the simple form of the verb (the infinitive without the to).

You made the correct choice from the table below. Good job!

Infinitive Definition Simple
Present
Simple
Past
Past
Participle
Present
Participle
to lay to put something down lay(s) laid laid laying
to lie to rest or recline lie(s) lay lain lying

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