| A.An atomic bomb was dropped on Hiroshima and Nagasaki. |
| B.After research and development efforts, an atomic bomb was born. |
| C.An invasion was about to take place with the use of the atomic bomb. |
| D.The birth and use of the atomic bomb ended the Second World War. |
| A.Nazi Germany’ success in making an atomic bomb |
| B.the possibility of atomic power from Nazi Germany |
| C.Japan’s unsatisfactory reply to the Allies’ Potsdam Declaration |
| D.destruction of everything from the explosion of the atomic bomb |
| A.Truman’s becoming the president of the United States. |
| B.The great destruction power of the atomic bomb. |
| C.Reducing the cost of its lives. |
| D.Not being content with Japan’s reply. |
| A.Between 105,000 and 120,000 people. |
| B.Between 35,000 and 40,000 people. |
| C.Between 70,000 and 80,000 people. |
| D.Between 140,000 and 150,000 people. |