用所给词的适当形式填空：

小题1:I am looking forward to          (watch) the soldiers raise the national flag this summer holiday.

小题2:zhong Jing ,one of the _______ (beautiful) country doctors has worked in a small village of Guangzhou for more than five years.

小题3:When I got up this morning.,it ______ (rait)  heavily outside.

小题4:Look! The students are playing ______ (happy) on the playground.

小题5:Come on,Mike! I have something important ______ (talk) with you.

小题6:The teacher told his students that the earth ______ (go) around the sun.

小题7:A bridge______(build) in my hometown next year.

小题8:______(use) such a fashionable mobile phone can make us feel good in front of others.

小题9:The soft music makes me______(relax).

小题10:He is going to celebrate his______(forty) birthday this Sunday.

( )在应用层对信息的保密性、完整性和来源真实性进行保护和认证。

A．物理安全

B．安全控制

C．安全服务

D．数字签名