分别用 against ，spend time on ，worry about ，how important it is to 造句

I have nothing against you 我同意你，我没什么反对的。

I have to spend much time on my homework .我不得不花很多时间在作业上。

My parents only worry about my grades .我的父母只担心我的成绩。

My parents always tell me how important it is to study hard and get good grades 。
我的父母总是告诉我努力学习和取的好成绩多么重要。本回答被提问者采纳