Our special thanks go to thousands of volunteers, without ________tireless work, none of this would be possible．
| A．whose | B．which | C．whom | D．that |
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.All these changes will lead to stronger China, country that can surprise and enrich our planet.
| A．a; a | B．a; the | C．the; a | D．the; the |
Jack always sleeps late on Sundays. I’m sure he when we get to his home.
| A．is still sleeping | B．is to be sleeping |
| C．will still be sleeping | D．will have been sleeping |
Unitl tens of years ago, most zoos in such a way—animals in one area and birds in another.
| A．were organized | B．had organized |
| C．will organize | D．have been organized |
It is well known 
that the Internet will let people have to huge amounts of information from their own homes.
| A．appeal | B．attention | C．access | D．approach |
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