The correct option is C Work
The selected option is the only appropriate answer as the preceding adjective some denotes the object in the sentence, which is work. Option A is a participle form which does not go with the sentence. Option B is incorrect taking into account the adjective some, which denotes nouns in plural. Work is an uncountable noun, thus the plural form is incorrect, making Option D inappropriate. Option C, i.e. Work is the most suitable answer for the given question.