take up后如果接动词的话，应该用动词的ing形式。
take up
拿起；开始从事；占据(时间,地方)
例句：
While we were in China, my wife and I joked with friends that now was the time to take up smoking, since our lungs would never know the difference.
当我们在中国的时候，妻子和我与朋友开玩笑说现在是时候开始吸烟了，那样我们的肺便永远不会知道其中的差别。
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