我妹妹去年开始学游泳。这让她变得更健康了。
My sister started learning to swim last year. This made her much healthier.
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This英 /ðɪs/|美 /ðɪs/
解释
this 是指示代词，作后一句的主语，指代前一句所说的"学游泳"这件事。this 回指前文已提过的活动。
My sister started learning to swim last year. This made her much healthier.
this 是指示代词，作后一句的主语，指代前一句所说的"学游泳"这件事。this 回指前文已提过的活动。