Passengers on board aren't allowed _____ calls during take-off．
| A．making or receiving | B．to make or receive |
| C．to have made or received | D．having made or received |
_____ world’s largest retailer, Wal-Mart, has opened its ______ third store in Beijing, which means the firm now has 52 stores in China.
| A．The; a | B．A; a | C．The; the | D．The; / |
The doctor came out and said the operation was well finished. The parents smiled ________ and the nervousness disappeared from their faces.
| A．in relief | B．in danger | C．in peace | D．in reality |
Rainforests _______ and burned at such a speed that they will disappear from the earth in the near future.
| A．cut | B．are cut | C．have been cut | D．are being cut |
Smile is recognized as a/an _________ language, which can be understood by people all over the world.
| A．artificial | B．technological | C．universal | D．analytical |
The conference has been held to discuss the effects of tourism _______ the wildlife in the area.
| A．on | B．in | C．at | D．of |