根据上下文意思补全短文，每空一词

On Sunday morning, Bruce goes out    1   a picnic    2   his classmates. They take some food there. Diana wants Bruce    3   sing a song with her,    4   he has no time. He    5   to cook. Frank and Clark    6   like to fly a kite, but they    7   to bring it. Wendy is a nice girl. She    8   water for them.    9   about Helen? She calls their teacher, Miss Li. She asks    10   to come here.

1.       You must write a s__________ at the end of the letter so that they can know who writes the letter.

2.       My father is the manager of the company, so he a__________ lots of meetings every day.

3.       What number should you d__________ when there is a robbery?

4.       A__________ are an ancient invention of China. They are so fast and accurate that people still use them today.

5.       Disneyland, which was created by Walt Disney, is a famous a__________ park in the United States of America.

6.       Trees are __________ (nature) air conditioners, for they can take harmful gas from the air, and release oxygen into the air.

7.       We should try to make a __________ (different) to make our world more beautiful.

8.       Wendy is really a whiz-kid. She can achieve A __________ (grade) in all subjects.

9.       20 __________ (multiply) by 6 is equal to 120.

10.   We all like a peaceful world. We want to live __________ (peace) with all the living things.