上学期，我参加了地理小组的研究性学习。我们研究的课题是：环境污染与环境保护。
Last term I took part in a geography research study group. Our topic was environmental pollution and protection.
研究性学习在我校有着很长的历史，在我们上几届学长中，都积极参加过这项活动。
Research study in my school has a long history of seniors in our last sessions, have been actively participated in the event.
上学期，我参加了地舆小组的研究性学习。
上学期，我参加了地舆小组的研究性学习。
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