【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,參加體育健身項目的人數(shù)激增。時間狀語during the last three decades常與現(xiàn)在完成時連用，故應(yīng)使用現(xiàn)在完成時。

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