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Directions: Read the question below. You have 30 minutes to plan, write, and revise your essay. Typically, an effective response will contain a minimum of 300 words
题目原文：
Which one is the most important factor to help you work productively:
A. Having an environment free of noise and distractions;
B. Knowing that you will receive a reward;
C. Doing something you are interested in.
