In January , 2004, the United States successfully launched “Spirit”, a Mars Exploration Rover, _____ a new milestone in the history of mankind.
| A．it marked | B．marking | C．marked | D．to mark |
People born under the Chinese sign of the Tiger are attracted to fast cars and have
strong need for emotional independence.
| A．the; a; X | B．X; a; the | C．X; the; the | D．X; a; X |
Such a great event __________ that it will attract governments and people from across the world to Shanghai．
| A．is World Expo 2010 | B．World Expo 2010 is |
| C．has World Expo 2010 been | D．World Expo 2010 has been |
________spending our vacation in the city，why not try hiking in the courtry?
| A．Instead of | B．In favour of | C．In case of | D．In terms of |
— We should recycle everything we can．
— Absolutely．These may seem little things，but they’re not__________it comes to saving the
environment．
| A．since | B．when | C．while | D．as |
No ready technical data was ______________，but we managed to go without．
| A．believable | B．convenient | C．available | D．accessible |