Fill in the blank: The thief has ____ all my belongings.

Answer: stolen

Explanation: 'Stolen' is the past participle of 'steal' and is used when the object is the thing unlawfully taken. It is the most natural and precise choice here.

• robbed – 'Rob' usually takes the person or place as its object. Use constructions like 'The thief robbed me of my watch' or 'The bank was robbed.' 'The thief has robbed all my belongings' is not idiomatic.

• taken – Grammatically possible ('The thief has taken all my belongings'), but neutral. It does not explicitly indicate unlawful appropriation in the way 'stolen' does.

• taken away – Emphasizes removal or relocation and is less idiomatic for describing theft. It is understandable but not the best choice to express that belongings were stolen.

Correct sentence: The thief has stolen all my belongings.