As we all know， tigers are in danger of dying out.
| A．the；不填 | B．不填；不填 | C．the；the | D．不填；the |
35．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 |
34．________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 |
33．— 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 |
32．No ready technical data was ______________，but we managed to go without．
| A．believable | B．convenient | C．available | D．Accessible |
31．Every solid object______reflect a sound，varying according to the size and nature of the object．
| A．must | B．shall | C．will | D．Should |