Born on July 1st，1948，in the small Italian city of Palmi，Roberto Crea was a genius kid.He moved to the Netherlands and majored in Biological Chemistry in the University of Leiden.It was this university that directed his interest in the synthesis of nucleotides，the basic units that are required to build a DNA.At that time，not many researchers studied the combination of genes，but Roberto's strong chemistry background made a historical invention possible.
    In 1977，he joined the Genentech，Inc.jye.ai the gene synthesis team at City of Hope Medical School.The company funded Dr.Crea's on-going research on gene synthesis.After working day and night，the brilliant individual finally invented a new procedure that improved the chemical synthesis of genes.Thanks to his rich knowledge and the joint efforts of the excellent Genentech team，he made use of this discovery to produce the human insulin genes，A and B.It was his invention that allowed Genentech to be labeled as the first producer of human protein.This benefited hundreds of millions of people suffering from diabetes all over the world.
   Today Roberto is known as the father of synthetic insulin and almost won the Nobel Prize.His efforts did not stop after discovering the synthetic insulin；in fact，he was more than driven and tried to make more contributions to the field of biotechnology.His team of experts discovered Ziconotide under his teachings and guidance.According to leading scientists and researchers，this drug is more powerful and effective than morphine，and the best part of this is that it has zero side-effects.
    Dr.Roberto Crea has a long list of creditable discoveries and researches that he has achieved in 65 years of his life.He is an inspiration for many individuals who aim to add value to humanity with the help of science.
（1）Which of the following best describes Roberto？

A

A

A．Devoted and talented.
B．Enthusiastic and generous.
C．Ambitious and patient.
D．Courageous and calm.
（2）What may contribute to Roberto's invention of the human insulin？

C

C

A．His creative imagination.
B．His curiosity about his study.
C．His knowledge of chemistry.
D．His good luck in his life.
（3）What do we know about Roberto in Paragraph 3？

C

C

A．He discovered morphine with his team.
B．He won a Nobel Prize.
C．He stuck to his scientific research.
D．He retired after making the great discovery.
（4）What do the underlined words "this discovery" in Paragraph 2 refer to？

C

C

A．A simple technique of separating human genes.
B．A special way of producing human protein.
C．A new procedure for improving the synthesis of genes.
D．A reliable method for curing people of diabetes.