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Of all my subjects, I like ____ physics best because it gives us____ useful knowledge of science. And I hope to become ____ scientist in the future.

       A．/ ; a; /             B．the; / : a           C．/ : an: /            D．/ : a: a

Of all my subjects，I like         physics best because I hope to become        scientist.

A. the；不填             B. the；a             C. 不填；a          D. the；the