第一題:
Many,many years ago,people used a stick,a large piece________wood and dry leaves to make a fire.Today,people use fire______many different ways.________home,we use fire to cook food and boil water.However,fire can be very dangerous.Careless people can lose their lives and homes.Therefore,we must be careful______fire.
第二題:
The oceans are very important to to all animal
更新1:
第二題: The oceans are very important to to all animals________earth.Plepoe get food_______the oceans.__________the ocans,you can find coral,starfish and sea-horses.They are interesting and beautiful sea animals.We must not throw rubbish_______the ocans.We must keep the ocans clean_________pollution.