I am doing my homework carefully to get a good grade. （我正在认真做我的家庭作业以取得好成绩。）

She is doing the dishes after dinner to help her mom. （晚饭后她正在洗碗来帮她妈妈。）

They are doing some shopping at the mall this afternoon. （他们今天下午正在商场购物。）

He is doing exercise every morning to keep fit. （他每天早上都在锻炼以保持健康。）

We are doing a science experiment in the lab now. （我们现在正在实验室里做一个科学实验。）

The children are doing art projects in the classroom. （孩子们正在教室里做艺术项目。）

My father is doing yard work on the weekend. （我爸爸周末正在做庭院工作。）

The workers are doing construction on the new building. （工人们正在建造新大楼。）

She is doing research for her thesis at the library. （她正在图书馆为她的论文做研究。）

They are doing volunteer work at the local shelter. （他们正在当地的收容所做志愿工作。）

I'm doing laundry because my clothes are dirty. （我正在洗衣服，因为我的衣服脏了。）

He is doing his best to solve the difficult problem. （他正在尽最大努力解决这个难题。）

The students are doing group discussions about the topic. （学生们正在就这个话题进行小组讨论。）

My mother is doing gardening and planting flowers. （我妈妈正在做园艺工作并种花。）

They are doing a play for the school performance. （他们正在为学校演出排练一出戏剧。）

She is doing yoga to relax her body and mind. （她正在做瑜伽来放松身心。）

We are doing a survey to collect people's opinions. （我们正在做一项调查来收集人们的意见。）

The chef is doing food preparation in the kitchen. （厨师正在厨房里准备食物。）

He is doing repairs on his old car in the garage. （他正在车库里修理他的旧汽车。）

They are doing a dance routine for the competition. （他们正在为比赛排练一套舞蹈动作。

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