阅读下面短文，根据短文内容完成下列句子。
Schools all around the world have their own rules for students. However, perhaps one rule is
common in all lhe schools-students can't chew bubblegum in school.
But every year on the first Friday in February, many schools in the USA encourage their students to
"break the rule". They hope the students can take part in the activity called Bubble Cum Day". The iclea
of' Bubble Gum Day came from children's book writer Ruth Spiro. He thought it woulcl be cool to have
lots of children chewing bubble gum and raising money on the same day. The money is often going to
some charity. Bubble Gum Day turned out to be a sweet success.
Now Bubble Gum Day is more and more popular in the country. Many people outside school also
begin to join in the activity. Isn't it great?
1. All sclloo in all over the world have their _____ for students.
2. Bubble Gurn Day is on the first _____ in February in America.
3. _____ got the idea of Bubble Gum Day.
4. Now Bubble Gum Day becomes very _____ in the USA.
5. Many people _____ begin to join in the activity.