单项选择题

Passage One
Questions 26 to 29 are based on the passage you have just heard.

A. The performer of acupuncture knows a lot about the making of needles.
B. Acupuncture has existed in China for as long as 2,000 years.
C. An operation now needs fewer needles than in the past.
D. Few patients prefer acupuncture to chemicals.