Do you know that the"Happy Birthday to You" song is the first song sung in outer space？Apollo IX astronauts （1） it on March 8，1969．It is one of the most popular English songs of all time． Here's the story behind it．
The song was written by two sisters from Kentucky， Mildred and Patty Smith Hill． It was first published under the（2） of "Good Morning to All"in 1893． It was used as a classroom （3） ．Teachers sang it each day to welcome their students to the classroom．
The composer， Mildred Hill， was a concert pianist． Her sister Patty Smith Hill wrote the original（最初的） lyrics（（歌词） for the song while she was a teacher in a kindergarten in Louisville，Kentucky， where Mildred also （4） ．
The Hill sisters copyrighted（取得版权） their song on October 16，1893． However， it appeared （5） their agreement in Robert H． Coleman's songbook on March 4，1924．Coleman changed part of the lyrics to say， "Happy Birthday to You"， （6） the song still had its original title． The song was then published several times over the next ten years， often with small （7） in the lyrics．In 1934， when the song was sung every night in a Broadway Musical， another Hill sister， Jessica， went to court（法院） over the copyright problem of the song．She was （8） about the theft of the song and the failure to pay to her sisters． She （9） her case． The Hill family owned the rights to the melody and had to be （10） every time the song was part of a commercial（商业的） production．
The Hill sisters， who devoted their lives to educating children， could never imagine that the simple little song would continue to earn about ＄2 million every year．
（1）A． saved |
B． wrote |
C．invented |
D．sang |
（2）A． notice |
B． order |
C．title |
D．law |
（3）A．party |
B． greeting |
C．discussion |
D．test |
（4）A． taught |
B． searched |
C． sold |
D．prepared |
（5）A．as |
B． under |
C． for |
D． without |
（6）A． although |
B． until |
C．because |
D．after |
（7）A． chances |
B．tasks |
C． changes |
D．signs |
（8）A． satisfied |
B．glad |
C．curious |
D． angry |
（9）A． lost |
B． won |
C．heard |
D．dropped |
（10）A． paid |
B． praised |
C． invited |
D． warned |
People think Paul is very （害羞的）．But in fact，he talks a lot．
I have a lot of （规则） in my house．
I used to be afraid of the （黑暗）．
Last month．I donated two （百）yuan to the people in Ya'an．
What is 5G？ It is the fifth generation of mobile network technology． In the past， 1G let us talk with each other． 2G let us send messages． 3G gave us the Internet． And 4G made all of these things faster． What's special about 5G？
5G + entertainment
5G networks are about 10 times faster than 4G． This means you can download a movie in seconds using 5G． Also， VR games will become more popular with 5G． 5G will make the VR games even more real．
5G + smart home
5G also makes the Internet of Things（物联网）possible．Smart home is part of it．For example，your bread maker could make breakfast by itself after your alarm rings． And if the air in your room is too dry， a smart sprinkler could water your plants by itself when you are not at home．
So you just need to buy a new mobile phone to use 5G． But a 5G phone costs about 8，000 yuan right now． It is said that about one year from now， the price could go down to around 2，000 yuan．
（1） （2） （3） （4） （5）