26 I haven't finished my project _______.

The correct answer is 'yet'. Explanation: 'Yet' is often used with the present perfect tense in negative sentences to show that something has not happened up to this point but is expected to happen in the future. The completed sentence is: "I haven't finished my project yet." 'For' and 'since' are associated with longer durations of time, not a project not yet completed. 'Already' is used in positive sentences to show that something has been completed. { "correct_answer": "yet" }