Food is very important．Everyone needs to 1 well if he or she wants to have a strong body．Our minds also need a kind of food．This kind of food is 2 ．We begin to get knowledge even 3 we are very young．Small children are 4 in everything around them．They learn 5 while they ale watching and listening．When they are getting older,they begin to 6 storybooks,science books…,anything they like．When they find something new,they love to ask questions and 7 to find out answers．What is the best 8 to get knowledge?If we learn by ourselves,we will get 9 knowledge．If we are 10 getting answers from others and do not ask why,we will never learn well．When we study in the right way,we will learn more and understand better．
We are lucky to live in a rich country where we have many things．However, most of us usually 1 some things．
Electricity is one thing 2 we waste most．Lights, TVs, 3 and other things are often kept on even when no one is using them．We should turn them off when we do not need them．It 4 less than a second to do it．Anyhow, not wasting electricity save money, because we do not have to 5 the electricity we do not use．
The second thing that we often waste is water．Fresh water is precious, 6 it shouldn’t be wasted．It is only a simple matter of turning off a tap．I am sure 7 can do this easily if he wants to．
8 big waste is food．My mother 9 cook so much food that much of it was thrown away．I told her we had wasted so much 10 ．She thought I was right and now cooks 11 what we can eat．
It is not 12 to be wasteful．I find there is a simple 13 of not wasting things．That is to use only what we 14 ．Do not touch what we do not need． 15 this way we can stop being wasteful．
We are in the park now． 1 is a big and beautiful park． 2 many people in it．We all like this park．The park has a 3 , too．We can boat on it．But we 4 swim in it．It is dangerous(危险的)．
Look at that family．They are under the tree．The boy is 5 the left of his father．The family bring their 6 to the park．It is a white cat．The boy has a 7 in his hand．He wants(想要)to fly it．
But I think they 8 look for a right place．It’s not a good place here．There are too many trees．
The mother has a beautiful handbag．It’s 9 ．I like the color．It’s the color of the sky(天空)．
There is a 10 in the tree．It says“Don’t climb the tree!”But the cat is climbing up the tree now．
根据短文内容选择可以填入空白处的最佳答案。(Choose the best answers to complete the passage．)
We sometimes call the lion“the king of the jungle(丛林)”because it is stronger and more dangerous than other animals．It can 1 faster than many animals and it can hunt(捕猎)the beast．It is the highest animal in the 2 food chain(食物链)．
In the sea, the shark is one of the animals at the 3 of the food chain．It can swim faster than 4 other sea animals, and it can use its big teeth to eat them．
What is at the top of the world's food chain? 5 are! We are not the biggest or fastest, but we are the 6 ．We could not run faster than cheetahs(猎豹), so we 7 cars and now we can move the fastest．We could not 8 better than lions, so we invented guns(枪)．Now we can hunt the beast．
People's inventions are clever, but they can be 9 , too．For example, people invented 10 , and now they make the air and rivers dirty．This can make 11 changes．Dirty rivers kill fish． 12 bears cannot eat the fish and the bears die．If we kill one part of the food chain, 13 also die．Remember that we are a part of the food chain, 14 we are in danger too! If we protect animals, we are protecting 15 !We should and we could do something for the world!