I ___ Japanese since 1977.
| A．have been learning | B．learn | C．have learn | D．is learning |
Oh, look at you---you are trembling! You must feel cold now. In fact, you __________ in person. You can contact us by phone next time.
| A．didn’t need to come | B．needn’t come |
| C．needn’t have come | D．don’t need come |
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 |