题目内容：
共用题干Family History
In an age when technology is developing faster than ever before,many people are being ______(1)to the idea of looking back into the past.One way they can do this is by investigating their own family history.They can try to______(2) out more about where their families came from and what they did.This is now a fastgrowing hobby,especially in countries with a______(3) short history,like Australia and the United States.
It is______(4)thing to spend some time______(5) through a book on family history and to take the______(6)to investigate your own family's past.It is______(7) another to carry out the research work successfully.It is easy to set about it in a disorganized way and______(8) yourself many problems which could have been______(9)with a little forward planning.
If your own family stories tell you that you are______(10) with a famous character,whether hero or criminal,do not let this idea take over your research.Just______(11) it as an interesting possibility.A simple system______(12)collecting and storing your information will be adequate to start with;a more complex one may only get in your______(13).The most important thing, though,is to______(14)started.Who knows what you ______(15) find?
4._________
A:a
B:one
C:no
D:some
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