completely. Medical advances ranged 1.from discovering the causes of diseases under microscopes to surgical procedures replacing diseased organs with 2.donated (donate) ones.

　　It is possible to single out a few 3.pioneers (pioneer) of the 20th century. Here are five of them.

　　One of the 20th century's premier scientists was Albert Einstein. In the summer of 1905, this outspoken young man was rocking his one­year­old baby 4.when he was suddenly inspired. "E＝mc2" was born.

　　5．Using (use) the most high­powered telescope of the time, he began the long, slow process of exploring our galaxy. Edwin Hubble discovered small areas of mist which were 6.in fact galaxies like our own millions of light years away from us.

　　Alexander Fleming saw 7.a blue mould in the dish around which the bacteria had been destroyed. This blue mould was in fact the natural form of penicillin.

　　During the Second World War, when Fleming's discovery was first helping 8.to_cure (cure) people, the US Navy was looking for ways of improving the accuracy of their missiles. The navy turned 9.to Eckert, an engineer, and Mauchly, a physicist, to wrestle with the problem and produce a machine which was the world's first computer to do the job. 10.Without the breakthroughs of these pioneers in science and technology, whether lucky or planned, the world as we know it today would have been a completely different place.

　　Ⅴ.阅读理解

　　What's more exciting than having a fresh hot pizza delivered to your door? How about having it brought to you by a robot? Thanks to Domino's Robotic Unit or DRU, that just became a reality. On March 8, the three­foot tall robot made its first delivery to some lucky residents in Brisbane, Australia.

The autonomous DRU is the result of a cooperation between Domino's Pizza Australia and Marathon Robotics. The machine can cover a distance of up to 12 miles and back before requiring a battery recharge. Equipped with Google Maps and GPS guidance, DRU can go along bike paths and sidewalks and also find the most efficient way to its destination. LIDAR, a laser­based sensor technology similar to the one used in self­driving cars, enables DRU to detect and