完形填空
阅读下文，掌握其大意，然后从各题所给的四个选项中选出一个最佳答案。（每小题1分）
Three ________ ago, my family got our first computer.   ________  the beginning of this summer, I found it was too old and I wanted to get a  ________ one. After my father and I talked for a long time, he   ________  . We went to many shops and read many ads.________ we bought an HP computer.
During the first week, I noticed  ________ our computer had some problems. I spent many hours  ________ to fix it, but it ________  work. So I  ________  to phone the HP company and ask them   ________  to work out my problem. They told me to wait until the next morning because all their workers were   ________ that day.
The next morning two workers came. It took them many hours to mend it, but the computer ________ did not work. My dad had no other way but to return the whole thing. A few days later, we decided that I should go on the Internet and order some parts to build a new computer by  ________ .
It was not an easy job for me to build a new computer. I tried many times, and in the end I was successful. From these setbacks(挫折), I have learned a lot. Now I believe that if the HP computer hadn't had any problems,________  I would not have learned how to build the new one. Even though I spent lots of time on it, I know it wasn't  ________ .

A．days B．weeks C．months D．years

A．At B．On C．To D．For

A．big B．new C．cheap D．small

A．won B．paid C．agreed D．received

A．At first B．At last C．At once D．At times

A．if B．that C．what D．how

A．try B．tried C．to try D．trying

A．do B．did C．don't D．didn't

A．hoped B．have C．had D．liked

A．how B．what C．why D．where

A．free B．sad C．busy D．exciting

A．already B．always C．still D．usually

A．themselves B．himself C．itself D．myself

A．or B．then C．so D．and

A．a waste of time B．a successful job C．a good computer D．a bad company