A：Hey，Jane!Have you heard about the art and science fair？

B：（78）　　

A：Yeah，that's the one．The school notice board says that all the students are invited to attend for

free!（79）　　

B：Wow，that's great!

A：（ 80）　　

B：Did you see anything cool？

A：Sure!All the works there were made by university students．

B：What did you see？

A：I saw a huge model plane．It's made of used wood and glass．（81）　　 It's made from grass，

leaves and flowers．

B：Oh，yeah，the fair is about environmental protection and recycling，right？

A：Yes，and the students came up with some really interesting and creative ideas．

A．I also saw a really beautiful painting． B．You mean the one just outside the science museum？ C．I went there yesterday． D．Our school is paying for it!