The flood is believed ____ more than 50 people and made thousands homeless, ____ it perhaps the most destroying flood in history in the area.
| A．killing; to make | B．to have killed; making |
| C．to have killed; having made | D．having killed; making |
He was ______ medical student before he turned _______ engineer.
| A．a; an | B．the; the | C．a; / | D．/; an |
He’s so ill that his father has to send for _______ doctor.
| A．one | B．some | C．a | D．the |
The price of _______ bike will partly be determined by the sort of ______ material used.
| A．the; the | B．the; / | C．/; the | D．/; / |
Jumping out of _______ train running at a speed of 200 kilometers per hour is quite _____ dangerous practice.
| A．/; the | B．/; a | C．a; a | D．the; the |
---Are you satisfied with what the captain explained?
---Not at all. It couldn’t have been________.
| A．so bad | B．worse | C．the worst | D．the best |