请用听到的信息(单词或词组)完成下列句子。

When flowers　 71　 on the cherry trees, friends and families have picnics under the trees,　 72　 by a sea of beautiful pink flowers.

People use flowers, nuts, seeds and other things to　 73　 beautiful pictures in soft clay around an old　 74　 .

These pictures can take　 75　 seven days to finish, but they　 76　 only a few days.

　 77　 does not　 78　 flowers, but flowers are an important part of the festival.

Many holidays have the　 79　 of giving flowers to a　 80　 one.

30.-It’s late. I must leave now.

-OK.　　

A. Thank you　　 B. Take care.　　 C. I’m sorry for it.　　 D. Don’t worry.

29. It was in the museum　　 I came across my best friend.

A. where　　 B. which　　 C. that　　 D. when

28. He was too tired and fell asleep with a book　　 open on his knee.

A. laying　　 B. lying　　 C. laid　　 D. lain