句型转换。

1. I, hope, Thursday, next, to my party, come, can, you(.) (连词成句)

    ________________________________________________

2. He is going to look after his grandma well. (改为同义句)

     He is going to______  ______ ______ ______ his grandma.

3. You need to exercise more to keep fit. (改为同义句)

     You need to ______more ______to keep fit.

4. You have to do the shopping. (改为否定句)

     You______ do the shopping.

 5. I can buy some drinks and snacks. (改为语气委婉的疑问句)

    ________________________________________________ ?

食品添加剂的作用是（）。

A.防止食品腐败变质

B.改善食品感官性状及物理状态

C.提高食品质量及花色品种

D.提高食品营养价值

E.以上都是