I study hard,but I am still not good at math(改为同义句）

Although math diffcult,but I study hard Although I study hard,( ) I often fail the exam.A:but B:or C:and D:／ But now,I will study hard to realize my dream. I will study more hard i hard to study english I want to study better.What should I do?But I do not want to study hard at all! I study hard,but I am still not good at math(改为同义句） I study hard, but I am still not good ai math.同义句 I _______ (make a decision) to study hard this semester. _____ a student,I must study very hard. I need to study hard 对 study hard 提问 I quit...I'll study hard.I quit...I'll study hard.我大脑迟钝... I can promise you,but you need to study hard中文 but i have to study I should study hard and should study well make a little progress every day. I have a hard time _____ English now.填study还是to study? I should study hard in future I will study hard from now on.