请根据括号中的中文提示、英文释义或句意,写出句中所缺单词,使句子通顺
【小题1】While watching, you can send text ___________to them and you may get a prize.
【小题2】I came here ___________(专门) to see you. I hope you are happy every day.
【小题3】—Would you please buy me a___________ (up-to -date)magazine on the way back home?
—With pleasure.
【小题4】On the morning of January 1st, 2018, lots of people gathered at Tian'anmen Square to watch the ___________of the national flag.
【小题5】Of all the_____________（小发明）)，which do you think is the most useful?