Nowadays, incoming generations really rely now on the power of the "Internet" when it come

s to searching for information. Just type the word or phrase you're looking【C1】______ and click, there goes your answer. So why【C2】______ wasting time turning the pages of encyclopedias if in just a snap of a finger you have what you needed？ People underestimate the power of encyclopedias. Well, technically, all of them are【C3】______ sources which means, they are like the walls that can fully support your data. They are first hand accounts done by professionals and【C4】______ .

On the other hand, Internet information I'm not saying all of them, are【C5】______ secondary, or third hand sources【C6】______ basically means that they have been edited or【C7】______ .They maybe data collected from several sources and were put together. However, the problem here is the errors which the writer or the author【C8】______ . He/she may have different under standing on the data than you,【C9】______ you have actually seen the data. So it is like you're just a kid listening to other's story instead of you telling your own.【C10】______ from that, you're not 100% sure that the author is【C11】______ . He/she maybe just a kid posting and posting wrong ideas for【C12】______ .

What I would like to【C13】______ here is that manual research is still stronger than any other. There is freedom in it, freedom to give your【C14】______ , under standing, insights towards these first-based ideas. You also type your work【C15】______ gathering the data so you become more【C16】______ with it because writing is the last stage of learning since you make an output out of your【C17】______ . Unlike the one in the Internet, some people also tend to "copy-paste" their works【C18】______ ever reading them. So they don't absorb【C19】______ must be absorbed. As they say, "No Pain, No Gain", so working hard with your research will surely be a【C20】______ and a strong one.

【C1】

A．after

B．at

C．for

D．into