根据句意，用括号中所给词的适当形式填空。(共5小题，每小题1分，满分5分)

小题1:In our life, whatever we do, we should never give up no matter how many ________ we have. (difficult)

小题2:How ___________ the room is ! There are so many people singing in it. (noise)

小题3:Chocolate is usually the ____________favorite food. (child)

小题4:Climb up to the ___________ floor , and you can enjoy a better view.(twelve).

小题5:Life is __________ and we should learn to enjoy our life. (color)

提高汽油质量和生产轻质油的主要加工手段称为（）过程。

A、裂化加工

B、重整加工

C、焦化加工

D、化工生产