13.18Hong Kong has about______ beaches. 19.People can go to most of the beaches by bus and go to some places_______. 20.Never swim when you feel______ or_______. 21.A red flag means it is dangerous for_______ and a blue flag means it is dangerous for______.
11.A.think of B.for example C.celebrates D.only E.such as F.small G.named
Have you ever heard of the story of Earth Day?Now let me tell you. Earth Day was started in 1970by a man (37)GJohn McConnell from the United States.In the beginning,it was held on one day in spring when the day and night are of the same length around the world.Now it is celebrated on April 22nd.Earth Day is now celebrated all over the world. Earth Day is a very special day.It makes all of us think about problems we make for the earth.It is not only a special day in the city where we live,but a day that the whole world(38)C. Some countries have Earth Day celebrations,and some people and groups join in Earth Day projects(39)E"Protect Our Home"and"Water for life". You can join in one of the projects,or start one of your own.It can be something (40)Flike planting a tree with your mom,or something large like cleaning up a park with your classmates or friends.You can do almost anything.Try to (41)A something you would like to do. Why do we celebrate Earth Day?Because we have (42)D one earth and it is our only home.It is getting very dirty.It is our duty to protect our beautiful home.Earth Day is a day to call on people around the world to save our earth.