（1）Who is the main inventor of Post -it Notes？
A.Mr Silver.
B.Mr Fry.
C.A company.
（2）When was the Post-it Note born？
A.In 1968.
B.In 1974.
C.In 1977.
（3）How many Post-it Notes are made every year by the company？
A.About 10 million.
B.About 50 million.
C.About 55 million.
（4）Why are Post-it Notes so popular？
A.Because they can be moved easily.
B.Because they have different colors.
C.Because they are of different sizes.
（5）What can you use Post-it Notes to do？
A.To take photos.
B.To eat and drink.
C.To make paintings.