The research is so designed that once _____ nothing can be done to change it.
| A．begins | B．having begun | C．beginning | D．begun |
Aluminum isn’t found free in nature, owing to its always ____ with other elements, most commonly with oxygen.
| A．being combined | B．having combined |
| C．combine | D．combined |
Being tall gives Yao Ming a(n) _______ over other basketball players.
| A．advantage | B．benefit | C．advance | D．profit |
Nowadays, many people walk to work ____Copenhagen Conference calling for living a low-carbon lifestyle to cope with global warming.
| A．in relation to | B．in response to | C．in addition to | D．in opposition to |
After suffering a heart attack, Michael Jackson was pronounced dead, ___ a tragic end to the world’s most popular entertainer.
| A．having marked | B．to mark | C．marked | D．marking |
China Daily gave us a vivid ________ of the successful ___________of Chang’er II.
| A．account; launch | B．explanation; start |
| C．description; send | D．imagination; boost |