The police have started an ___ into the cause of the fire which broke out in the hotel last night.

American artist Jeremy Telford made a room with balloons． He got the____    from Bag End in Lord the Rings, which is a hole in the ground where a Hobbit（霍比特人）lives in the film．

Putin will run for president next March in an election that could open the way for him to stay in ______ for 12 more years.

Despite such a big difference in ___ towards what one eats, there is no doubt that people in the west regard the Chinese food as something special.

The conference has been held to discuss the ________of global warming on people’s lives all over the world.