【題目】During the last three decades, the number of people participating in physical fitness programs___ sharply.
A.was increasing
B.has increased
C.had increased
D.will be increasing

【答案】B
【解析】句意：在過去的三十年里，參與身體鍛煉的人的數(shù)量激增。根據(jù)時(shí)間狀語判斷應(yīng)用現(xiàn)在完成時(shí)，故選B。

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