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

B

【解析】

試題分析：考查時態(tài)。根據(jù)句中During the last three decades,用現(xiàn)在完成時態(tài)�，F(xiàn)在完成時態(tài)句子中常用的時間狀語有in/over/during the last/past few years; so far; lately等。

考點：考查現(xiàn)在完成時態(tài)。

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