I’m very sorry-----I had to help my mother bacause she was b

I’m very sorry_____I had to help my mother bacause she was busy.
____填什么连词?
What does he think of the sports?
A.he likes it B.he loves it C.he doesn’t mind it D.he can't stand it.应该选什么?
It’s raining____（hard） 横线上写出它的适当形式
还有个问题：是不是除了程度副词外,其他副词修饰动词一般要放在句尾?
例如：Do your homework quickly!
耐心回答者,