More than 10,000 relics, ____ between 5,000 to 3,000 BC, ____ at Sanxingdui since it was first discovered.

Accidental discoveries have often opened the door to beauty and wonder.The rock paintings in France that date back 15 000 years,for example,　1　by two boys who were looking for shelter from the rain.The paintings 　2　became “the find of last century”.Or,the Sanxingdui Ruins,known by historians as “the Ninth Wonder of the World”,were discovered in Sichuan Province by a farmer.?

In the spring of 1929,Yan Qingbao,then a 43-year-old 　3　,discovered a circular piece of jade(玉)while digging a hole.　4　 by curiosity,he dug deeper and found a group of about 400 colourful jade pieces.At the time,he had no idea his discovery would be　5　?important as other wonders of the world 　6　,China's Great Wall and Egypt's pyramids.?

Since then,more than 10 000 relics(文物),dating back to between 5000 and 3000 BC have been unearthed(出土) at Sanxingdui.These relics　7　 gold,pottery(陶器),bone tools and ivory(象牙)objects.They prove that Sanxingdui contains the ruins of an ancient city that was once the political,economic and cultural center of the ancient Shu Kingdom—the old name for Sichuan.?

It has 8　 modern historians realize that Sichuan's human history went back 　9　 five thousands years,and located on the upper part of the Yangtze River.The site challenges the common idea 　10　Chinese civilization rose from a single source—the Yellow River valley.Sanxingdui was named the Scientific Education Base for China's Youth in March this year.?

But still,only four of the Sanxingdui Ruins' 12 square kilometers have been uncovered.Who knows what other big surprises are waiting to be shown to the world?

1.A.were discovered　　　　B.discovered?

C.was discovered　　　　　　　　 D.discovering?

2.A.then　　　　 B.only?　　　　 C.earlier　　　　 D.later?

3.A.teacher　　　　　　B.worker?　　　　 C.official　　　　D.farmer?

4.A.Driven　　　　　　　　　　B.To drive?　　　　 C.Driving　　　　　　 D.To be driven?

5.A.so　　　　　　　　 B.not?　　　　　　　　 C.as　　　　D.too?

6.A such as　　 B.for example　　　　C.for instance　　　　D.as well as?

7.A.contain　　　　　　B.mention?　　　　 C.consist　　　　D.include?

8.A.helped　　　　　　　　　　B.taken?　　　　　　 C.shown　　　　　　 D.proved?

9.A.about　　　　　　　　　　 B.less than　　　　　　 ?C more than　　　　　　 D.or so?

10.A.which　　　　　　　　 B.that?　　　　 C.when　　　　 D.where?