第1个回答 2014-10-05
Because I study hard, I get good grades. 这个为准
第2个回答 2014-10-05
I get good marks, because I study very hard.
第3个回答 2014-10-05
As a make efforts to learn,so I got a good scores.
第4个回答 2014-10-05
I get a good score because I study hard.