从方框内选择最佳选项完成对话。

a. Would you like some orange juice?

b. Thanks for inviting me. 

c. It tastes nice and a little sour. 

d. Let me have a try. 

e. I'm very happy you like the food.

A: The fish soup is ready.

B: ____ Oh! It's a little salty but delicious.

A: This is Italian pizza.

B: ____ What's in it?

A: I put some tomatoes in it.

B: Good!

A: ____ 

B: Yes, please. Oh, it's very fresh and cool.

A: ____ 

B: ____ 

A: You're welcome.

（I）画出三角形ABC沿着B点顺时针旋转180度的结果．

（II）画出三角形ABC按3：1放大后的图形．

铁元素____铝离子____二氧化硅____五氧化二磷分子____ 2个氧离子____，1个二氧化碳分子____，1个水分子____．