— Hey! Lucy! Have you heard about the optional courses this year?— _______ .What about that?

 —I’m not good at table tennis, you know. —　　　We’re playing for fun. Just try and you’ll see you can do it. 

－Dirty water shouldn’t be poured into rivers.－_______. It will cause pollution.

—My mother is preparing my favorite dishes. Go with me and have a taste, okay? -- ______ . And I’ll be glad to meet your parents.      

—I think the decorations of the bed designed for children are really fancy. —______. I really want to buy one for my son.