题目内容：

Choose the best answer（根据短文内容，选择最恰当的答案）

In the 1920s, scientists found a collection of bones near Beijing,China. They believed that the bones were human and that they were about 500,000 years old. They also believed the bones were important because they were form a little-known stage in the evolution of human beings.

The bones were kept in Beijing until 1941. Then because the Japanese army was advancing towards the city, the scientists decided to send the bones to the US for safety.

Dr Harry L.Shapiro, former Professor of Anthropology（人类学）at Columbia University, has been searching for them ever since. He believes they were stolen by the American army officer whose job was to take them to the US. He could be right.

After the war, a Chicago businessman offered $5,000 to anybody with information about the bones. A woman phoned him and told him she knew where the bones were. He arranged to meet her on the 102nd floor of the Empire State Building in New York. They met and she told him that her husband had come home from China with fossils（化石）of a prehistoric（of the time before recorded history）man. She showed him photographs of them. Then she walked away and was never heard from again.

A few years later, however, a Sydney businessman reported that he had the bones and that he had buried them in a forest in Tasmania. He offered to say where for a large sum of money. Then he, too, was never heard from again. Someone, somewhere, has the bones but nobody seems to know who or where.

1.How old were the bones thought to be?

A.Five thousand years old. B.Fifty thousand years old.

C.About half a million years old. D.A million years old.

2.The scientists thought the bones were important because ________.

A.they were human B.they were found on a state

C.they had a history of 50,000 years D.they were from an important evolution period

3.Why were the bones sent to the USA?

A.Because Americans liked collecting old things.

B.Because the bones might fall into the hands of Japanese invaders.

C.Because they could be sold for a lot of money.

D.because the Chinese didn't need them.

4.What happened to the Chicago businessman when a person contacted him about the bones?

A.He made friends with the woman. B.He only talked to her on the phone.

C.He has never been heard from again. D.He met her and saw the photos of some bones.

5.What happened a few years later?

A.A Sydney businessman offered to buy them for much money.

B.Nobody heard anything more about them.

C.A Sydney businessman took them to a forest in Tasmania.

D.An Australian said they were buried in Tasmania.

6.From the passage we can conclude that ________.

A.the woman was sure to know where the bones were B.the bones have not been returned to China

C.the bones must have been in the Australian's hands D.the Sydney businessman must have told a lie