China recently tightened its waters controls near the Huangyan Island to prevent Chinese fishing boats fromin the South China Sea.
| A． | attacking | B． | having attacked | C． | being attacked | D． | having been attacked |
The scientists predict that if present trends____, women in 400 years will be 2cm shorter and have healthier hearts．
| A．will continue | B．continue | C．are continued | D．will be continued |
I made a fire ____up the room as soon as my father came in．
| A．warm | B．warmed | C．to warm | D．warming |
These achievements_______ without the contribution of Qian Xuesen, a key leader of the New China's nuclear, missile and so on．
| A．would have been unthinkable | B．would not be unthinkable |
| C．would be unthinkable | D．would not have been unthinkable |
_______the match is lost? We can fight again!
| A．Even though | B．What though | C．If though | D．As though |
In this experiment, the famous professor showed three different____ to the study of physics．
| A．means | B．methods | C．ways | D．approaches |