用所给单词的适当形式填空。
1．Xiao Hua，did you watch the ________（excite）baseball match held in our city in April?
2．Our physics teacher told us that light ________（travel）much faster and sound．
3．October 1st，2009 is the ________（sixty）birthday of the People's Republic of China．
4．Liu Qian is successful now，but do you know that he learned magic all by ________（he）?
5．People are glad to see more and more tall ________（build）in Panzhihua in the recent years．
6．Don't give up．You'll have fun ________（learn）English．