由于我努力学习,所以我取得了好成绩。
Because I had studied hard,I got good scores.
I got good scores since I had studied hard.
I got good scores owing to my hard study.
都可以的
希望可以帮到你
望采纳
Because I study hard, I get good grades. 这个为准
I get good marks， because I study very hard.
As a make efforts to learn,so I got a good scores.
I get a good score because I study hard.
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