Final answer:
The preposition 'pendant' is the correct choice to complete the sentence.
Step-by-step explanation:
The preposition that best completes the sentence is pendant.
J'ai cherché du travail pendant deux semaines.
This preposition indicates the duration of time during which the action took place. In this sentence, it means 'for' or 'during'. For example, 'pendant deux semaines' means 'for two weeks' in English.
Learn more about prepositions in French