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。

Could you drive me to the supermarket after supper if _________________

Einstein was usually his scientific study that he even forgot to eat.

I hate travelling by air_______ you usually have to wait for hours before the plane takes off.

The teacher refused to have his daughter study in his class, ______ showing favour to her