5, I lost my money, so I couldn't buy a ticket.
6, I got up late, so I missed the train.
7, Because of being lazy, she couldn't pass the final exam.
8, Because of being sick, he couldn't go camping.
9, Because of the heavy rain, we couldn't go fishing.
10, Because of the hot water, I can't drink it.
11, People use energy-saving bulbs in order to save electricity.
12, We should do more grammar exercises so as to improve our English.
13, Although the test was very difficult, the students did it very well.
14, Though my sister was ill, she managed to finish her work.
15, Although Donna got the job, she didn't have the qualifications.
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