摘要：·Laboratories: from 84 to 203 ·Hospitals: from 20 . PART TWO: LANGUAGE KNOWLEDGE Section A Directions: Beneath each of the following sentences there are 4 choices marked A, B, C and D. Choose one answer that best completes the sentence. 21. Young as he is, David has gained rich experience in society. A. the,the B. a , / C. / , / D. /,the

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