【題目】To keep healthy, Professor Johnson ______ cycling as a regular form of exercise after he retired.

A. carried out B. caught on C. took up D. made for

【答案】C

【解析】

試題分析：考查動詞短語。在退休后，為保持健康，約翰遜教授開始把騎自行車作為一項(xiàng)固定的鍛煉方式。carry out開展； catch on變得流行； take up開始從事； make for導(dǎo)致，有助于。故選C。

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