A 12.03-carat blue diamond has been bought in Geneva(日内瓦) for a record $48.4m by a Hong Kong businessman. The businessman’s name is Joseph Lau, he bought the ring for his seven-year-old daughter and renamed it "Blue Moon of Josephine" after her. It is not the first time Lau bought valuable stones for his daughter. He is also the buyer of a 16.08-carat pink diamond, which was sold for $28.5m on Tuesday. It has been renamed "Sweet Josephine", a spokeswoman for Mr Lau told BBC News.

In 2009, he bought another blue diamond for his daughter—the 7.03-carat "Star of Josephine"—paying what was then a record $9.5m. Coloured diamonds are not easy to find in the world. The blue diamond was found in South Africa in January last year and was named "Blue Moon". Many people don’t think his money is clean.Macau wanted to put him into prison years ago, but he avoided by not visiting Macau.In 2013 a diamond known as the Pink Star was sold for what was then believed to be a record breaking $83m. 

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1.What color is the 12.03-carat diamond?

A White.

B Blue.

C Pink.

D Red.

解析：选B。细节理解题。根据第一段第一句A 12.03-carat blue diamond…可知，故选B。

2.Joseph Lau bought the diamond for his______.

A mother

B wife

C daughter

D girlfriend

解析：选C。细节理解题。根据第一段第二句It is Joseph Lau who bought the ring for his seven-year-old daughter,可知，故选C。

3.How many diamonds did Joseph Lau bought according to the passage?

A 1

B 2

C 3

D 4

解析：选C。数字计算题。刘銮雄分别买下了重12.03克拉、16.08克拉、7.03克拉的三颗钻石，故选C。

4.Joseph Lau didn’t buy _____ .

A Blue Moon

B the Pink Star.

C a 7.03-carat

D a 16.08-carat pink diamond

解析：选B。细节理解题。根据文中最后一句In 2013 a diamond known as the Pink Star was sold for what was then believed to be a record breaking $83m.可知并未提到是谁购买了“Pink Star”，故选B。

5.What’s the best title for the passage?

A A lucky girl.

B Colored diamond in the world.

C The most valuable diamond in the world.

D HK businessman buys blue diamond for daughter.

解析：选D。主旨大意题。D项“香港富商买下蓝钻送女儿”契合文章主要内容，故选D。