Read the following passage and see if you can decide whether to use the infinitive, the past participial (ed) or the present participial (ing) form of the words provided.
Plagiarism is [1a. define 1b. defined 1c. defining] as reproduction and presentation of the work of others without acknowledgement. The most easily [2a. detect 2b. detected 2c. detecting] examples of plagiarism [3a. occur 3b. occurred 3c. occurring] when a major segment of another's work is [4a. submit 4b. submitted 4c. submitting] to an examiner widely ....

Part II