在文中横线处填入下列词语，正确的一项是(　　)菜籽油含有亚油酸、亚麻酸、花生酸等三种人体　　　　的脂肪酸，还有油酸。菜籽油能　　　　胆固醇在小肠的吸收，还能促进肝内胆固醇的降解和排出，因此，它对　　　　心血管病的发生有一定作用。

I’ll never forget the day ______ I was born

How did the accident happen— You know, it difficultto see the road clearly because it .

We should practise speaking English _______ to improve our spoken English.

Are your family ready for rafting?—Yes, I really want my children to experience that they are young