2005年01月英语四级A卷试题（阅读4）

D) One could lose ten pounds in a years time if theres no increase in food intake.

30. What is the authors purpose in writing this article?
A) To justify the study of the Boston University Medical Center.
B) To stress the importance of maintaining proper weight.
C) To support the statement made by York Onnen.
D) To show the most effective way to lose weight.

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